您所在位置：网站首页 > 建筑/环境 > 施工组织 > 飞思卡尔单片机HCS综述教程

飞思卡尔单片机HCS综述教程.ppt

37页

卖家[上传人]：公****

文档编号：585884150

上传时间：2024-09-03

文档格式：PPT

文档大小：965.50KB

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

20金贝

下载

/ 37 举报版权申诉马上下载

文本预览

下载提示

常见问题

Freescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.TMFreescale HCS12 微控制器微控制器MC9S12DP2562005年年8月月TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.使用使用 HCS12的第一步的第一步1) HCS12 技术概述技术概述2) Operating Modes工作模式工作模式3) Resource Mapping资源映射资源映射4) External Bus Interface外部总线接口外部总线接口5) Port Integration Module端口集成模块端口集成模块6) Background Debug Mode背景调试模背景调试模块块1TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.工作模式工作模式MODAMODBMODC/BKGD RESETHCS12Mode RegisterSpecial Single ChipEmulation Exp NarrowSpecial TestEmulation Exp WideNormal Single ChipNormal Exp Narrow PeripheralNormal Exp Wide$_0BMode Pins are sampled and latchedon rising edge of Reset .CLOCK/RESETMODAMODBMODCSample Latch 2TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Modes of OperationMODC MODBMODAMODEADDRDATABDMSpecial Expanded NarrowAllowed0000000000001111111111110000816161616161616168---------AllowedAllowedAllowedAllowedAllowedActiveSpecial Single ChipSpecial TestEmulation Expanded WideNormal Single ChipExpanded NarrowPeripheral ModeExpanded WideMODA and MODB have active pulldowns during reset.MODC has the pull-up on the pin enabled after reset.Mode Pins are sampled and latched on rising edge of Reset 3TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.MODC, MODB, MODA Write CapabilityMODCMODBMODAMODEMODx Write CapabilitySpecial Expanded Narrow000000000011111MODC, B, A write anytime but not to 110no writeSpecial Single ChipSpecial TestEmulation Expanded WideNormal Single Chipno write001111111Expanded NarrowPeripheral ModeExpanded Wideno writeno writeno writeMODB, A write once but not to 110MODC, B, A write anytime but not to 1104TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.内部存储器映射内部存储器映射-寄存器寄存器1.寄存器,RAM,EEPROM可以通过设置INITRG,INITRM,INITEE来重新分配他们的位置。

2.这些寄存器只能写一次，建议在初始化分配寄存器，RAM,EEPROM的位置对每个INITxx赋值后，在其指令后需插入一空指令3.如果映射有冲突，寄存器具有最高优先级，与其重叠的RAM和EEPROM此时无效4.复位后，寄存器从0x0000开始，但可以被映射到64K空间内的前32K的范围内，而且映射的地址必须是2K的整数倍内部寄存器位置初始化寄存器15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 00 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0x10005TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.内部存储器映射内部存储器映射-RAM1、复位后RAM区从0x1000开始，但可以被映射到64K字节空间内的任何16K字节块内。

比如从$0000-$3FFF,$4000-$7FFF.2、RAM15-14用来决定RAM区映射到哪个16K的字节块中RAM13-11不起作用3、RAMHAL用来决定12KRAM是放在16K的后12K区域还是前12K区域比如INITRM=9,则RAM从$9000到$BFFF共12K内部RAM位置初始化寄存器6TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.内部存储器映射内部存储器映射-EEPROM1.DP256有4K的EEPROM，通过INITEE的EEON位来使能•复位后，EEPROM区域从$0000开始，但可被映射任意64K空间中的4K字节块内。

•EE15-12决定16位EEPROM区域地址的前4位比如：INITEE=0x11,则地址是从$1000开始内部EEPROM位置初始化寄存器EEON1 = EEPROM IS ENABLED0 = EEPROM IS DISABLED7TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.映射优先级映射优先级如果资源映射时，发生重叠，则优先级高的资源有效如果资源映射时，发生重叠，则优先级高的资源有效BDM space (Internal) when BDM is activethis 256 byte block of registers and ROMappear at $FF00 – $FFFF最高最高Register Space (Internal) – 1K bytes fullyblocked for registersRAM (Internal) – 12K bytesEEPROM – 4K bytesOn-Chip Flash EEPROM – 256K bytesRemaining external资资源源优先级优先级最低最低............在扩展模式下，所有没有被内部资源用到的地址空间将被默认为外部存储器在扩展模式下，所有没有被内部资源用到的地址空间将被默认为外部存储器8TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.强烈建议！强烈建议！•尽量使用默认的资源映射设置！•需要对资源映射时，注意不要使地址重叠，导致异常错误9TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.存储器映射存储器映射 & 工作模式工作模式 $0000$0400$1000$4000$FF00$FFFF$0000Registers$03FF$1000$3FFF$4000Flash$7FFF VECTORS 扩展扩展4K EEPROMRegisters12K RAM$0000EEPROM$0FFF VECTORS 单单片片4K EEPROMRegisters12K RAM 特殊单片模式特殊单片模式4K EEPROMRegisters12K RAM$8000Flash$BFFF$C000Flash (Page 63)$FFFF$FF00$FFFF BDM(If Active) 16K Flash(Fixed) 16K Flash(Fixed) 16Kx16 Flash Pages(Windowed) 16Kx16 Flash Pages(Windowed) 16K Flash(Fixed) 16K Flash(Fixed)Mappable to any 2K Block within the first 32K.Mappable to any 4K Block12K Mappable to any 16KBlock and alignable to top or bottomPage $3EPage $3F 16Kx16 internal Flash Pages(Windowed) 16Kx48 external Flash Pages(Windowed) 16K Flash(Fixed) 16K Flash(Fixed)10TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.FLASH•$4000–$FFFF间的存储数据是可以访问的。

•由于Flash 模块的地址范围超出了 HCS12 的64K (16-bit)地址空间，所以从 $8000–$BFFF被映射到若干16K字节大小的页框中由PPAGE寄存器决定在当前访问的是哪一页•$8000 - $BFFF间共有64个可访问的页使用PPAGE寄存器可以访问到地址在$8000–$BFFF间的所有共16页的16K字节•Flash模块中每个块包含许多行控制和状态寄存器，它们都位于的相同地址空间 INITRG + $100 - INITRG + $10F通过Flash 配置寄存器选择有效的某行寄存器•MC9S12DP256 有7个引脚端口，端口K，用来仿真或者作为通用 I/O其余六个端口用来决定哪一个Flash页正在被访问其余的地址位放在 PPAGE 寄存器中 11TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.FLASH•除了硬件的分页机制外，另外增加了两条指令，用来调用页内函数。

•CALL指令类似于JSR，除了把分页窗返回地址放到堆栈中，它还会在CALL指令把新的8位的数据写到PPAGE之前，把PPAGE的当前值放到堆栈中•调用CALL指令，需要用RTC指令返回•程序继续执行时，把PPAGE的值和分页窗口的地从堆栈中调出•MC9S12DP256的PPAGE有6位，可以有1M的寻址范围•低地址范围的768K通过PPAGE $00到$2F来访问，它被保留用作外部存储器（当使用扩展模式时）•高地址范围的256K由PPAGE的$30到$3F来访问，用作内部FLASH存储区12TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.FLASH分页机制分页机制•所有的256K的FLASH可以通过16K的PPAGE窗口来访问，其中两个16K的页也可以通过固定地址（$4000-7FFF, $C000-FFFF）来访问。

•$4000-$7FFF与$3E相对应，$C000-$FFFF与$3F相对应•这两个固定页克服了内存分页机制的一些缺点•采用分页机制，在某一页中的函数无法直接访问访问另一页中的数据•需要被其它页的函数访问的数据应该放在固定页中，或只有固定页的函数才能访问其他页的数据•因为复位和中断向量表只有16位，所以所有的中断服务程中断服务程序序和复位初始化程序复位初始化程序必须从固定页中开始执行•大部分中断服务程序可以放在非固定页中，部分的中断服务程序尤其起始部分要放在固定页中通过CALL来调用非固定页中的函数，最后用RTI指令返回13TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.FLASH-Codewarrior•Codewarrior引入两个关键字：near, far•Near函数用JSR或BSR来调用•Far函数用CALL来调用•比如：void far func1(void); //func1函数放在非固定页中，可以被其他页的函数调用•const int *far ptr; //指向常量的指针放在非固定页中，这个指针可以用来指向非固定页中的变量 14TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Codewarrior内存模型内存模型•Codewarrior支持3种不同的内存模型：•SMALL（默认），平面的64K的地址空间。

所有的函数都是near•BANKED，即采用分页地址所有的用户的函数都被默认为far•far类型的数据指针可以在SMALL和BANKED中使用•LARGE，默认为数据和代码均为分页模式所有的函数和数据指针都是far类型这种内存模型运行时间比较长，因此很少使用MC9S12DP256最常用的是BANKED内存模型15TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Codewarrior分段分段•代码和数据可以被分组被Linker放在特定的存储区中•#pragma用来给代码段或数据段命名并分配属性•#pragma CODE_SEG定义一个代码段。

•NEAR规定本段中的函数用JSR来调用，即只能被本页函数调用，除非把它放在固定页中•FAR规定本段中的函数用CALL来调用•如果没有规定NEAR或FAR,函数的类型由内存模型来决定•如果没有规定段，则代码放在DEFAULT_ROM中•所有跟在#pragma CODE_SEG后面的函数回放在该段中，直到下一个#pragma CODE_SEG出现，因此在头文件中，声明函数原型时，必须使用#pragma CODE_SEG#pragma CODE_SEG [NEAR|FAR] #pragma CODE_SEG FUNCTIONSvoid func1(void);void func2(void);#pragma CODE_SEG DEFAULT#include "functions.h"#pragma CODE_SEG FUNCTIONSvoid func1(void){/* code */};void func2(void){/* code */};#pragma CODE_SEG DEFAULT16TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Codewarrior-数据段数据段•#pragma DATA_SEG把全局变量发到一个特定的段中•SHORT规定本段中的全局变量采用直接寻址方式。

但是这段变量必须放在$0000到$00FF中•如果没有#pragma DATA_SEG，全局变量将会被放到DEFAULT_RAM段中•所有跟在#pragma DATA_SEG后面的函数回放在该段中，直到下一个#pragma DATA_SEG出现•如果全局变量被其他文件使用，则在其他文件中声明变量时，必须重复使用相同的#pragma DATA_SEG#pragma DATA_SEG [SHORT] 17TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Codewarrior-常数段常数段•#pragma CONST_SEG定义了一个常数段•PPAGE规定常数的访问要通过PPAGE, 常数可以放在非固定页•如果没有PPAGE,变量应该放在固定页•如果没有#pragma CONST_SEG，常数会被放在ROM_VAR•所有跟在#pragma CONST_SEG后面的函数回放在该段中，直到下一个#pragma CONST_SEG出现•如果全局变量被其他文件使用，则在其他文件中声明变量时，必须重复使用相同的#pragma CONST_SEG#pragma CONST_SEG [PPAGE] #pragma CONST_SEG Bextern const int var2;#pragma CONST_SEG DEFAULT18TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Codewarrior-中断函数中断函数•中断函数需要放在固定页•#pragma TRAP_PROC表示以下的函数将用RTI指令返回•如果使用interrupt关键字，则不必再写#pragma TRAP_PROC•__NEAR_SEG显性地表示这段代码放在固定页#pragma CODE_SEG __NEAR_SEG NON_BANKED #pragma TRAP_PROCvoid interrupt_func1(void){/* code */};#pragma CODE_SEG DEFAULT#pragma CODE_SEG __NEAR_SEG NON_BANKED void interrupt interrupt_func1(void){/* code */};#pragma CODE_SEG DEFAULT19TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Memory Map$0000$0400$1000$4000$8000$C000$FF00$FFFFVectorsRegistersEEPROMRAM16kBytefixedFlash16kBytefixedFlash16kBytepagedFlashNormalSingle Chip Mode$0000$0400$1000$4000$8000$C000$FF00$FFFFBDMRegistersEEPROMRAM16kBytefixedFlash16kBytefixedFlash16kBytepagedFlashSpecialSingle Chip Mode$0000$0400$1000$4000$8000$C000$FF00$FFFFVectorsRegistersEEPROMRAMExternalMemoryExpandedModeRegisters- Mappable to any 2k Blockwithin the first 32kByte.EEPROM- Mappable to any 4k BlockRAM- 12k Mappable to any 16kBlock and alignable to topor bottom.20TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.External Bus InterfaceA/D[15:0] R/W ECLK LSTRBHCS12HCS12• AD[15:0] - Address/Data Bus• ECLK - E clock 1/2 Xtal Frequency -> used for demultiplexing and external bus timing• LSTRB - Low byte strobe signal -> used to enable data on the low byte of the address bus• R/W - Read=1, Write= 0 -> used to determine the data bus direction21TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Latch AddressRead/Write Bus Cycle22TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Memory Interface ExampleR/WCEOECEOE[D15:8] [D7:0]AddressLatch &Decode LogicDATA [15:0]TO OTHER DEVICES HCS12ECLK 8Kx8 RAM 8Kx8 RAM B15 B8 B7 B0LSTRB0000 - - - -FFFE0001 - - - -FFFFWE WE D15 - D8D7 - D0AD [15:0 ]ADDR [A12:1]MUXED_BUSWIDE_MODEADDRESS............23TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Byte Select Logic CSLOGICMEMINT.CEWEOECEWEOEDATA BUSADDR_BUS A0LSTRBR/WECLKD15-8D7-0EVENODD24TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.资源映射资源映射MISC - Miscellaneous Mapping Control Register 综合映射控制寄存器EXSTR1 EXSTR0 NUMBER OF CLKS 0 0 0 0 1 1 1 0 2 1 1 3 EXSTR BIT DEFINITION FOR EXTERNAL ADDRESS SPACEROMHM 1 = Disable 16K Flash Direct Access @$4000 - $7FFF0 = 16K Flash page $3E accessible @$4000 - $7FFF(Note: This page can still be accessed through the Program Page Window)ROMON 1 = Enable Flash in memory map0 =Disable Flash in memory mapAddress Offset $0013EBICTL - External Bus Interface ControlESTR - E CLK Stretch Enable 1 = E Clock Stretches High High on External Accesses 0 = E Clock Stretches DisabledAddress Offset $000E25TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.External RAM at MC9S12DP256 26TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.GP I/O PORTSDDRAPORT ADDRBPORT BMultiplexed Address/Data Bus 7............………..............................................0 7..........……………..................................................0DDRB - Port B Data Direction RegisterPORTB - Port B Data Register 7.......………………....................................................07..…………………........................................................0 RST: U…….…………………………………………………..….U Read/writePORTA - Port A Data RegisterDDRA - Port A Data Direction RegisterDDRx 1 = PIN IS OUTPUT 0 = PINIS INPUTMux PortsAddress Offset $0002$0000Address Offset $0003$0001 RST: 0..................………..........................................0Expanded ADDR15/ ADDR14/ ADDR13/ ADDR12 /ADDR11/ ADDR10/ ADDR9/ ADDR8/& Periph: DATA15 DATA14 DATA13 DATA12 DATA11 DATA10 DATA9 DATA8Expanded ADDR15/ ADDR14/ ADDR13/ ADDR12/ ADDR11/ ADDR10/ ADDR9/ ADDR8/Narrow DATA15/ DATA14/ DATA13/ DATA12/ DATA11/ DATA10/ DATA9/ DATA8/ DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 RST: 0……..……………………………………………………..0 RST: U…….…………………………………………………..….U Read/writeExpanded ADDR7/ ADDR6/ ADDR5/ ADDR4 /ADDR3/ ADDR2/ ADDR1/ ADDR0/& Periph: DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DAT1 DATA0Expanded ADDR7/ ADDR6/ ADDR5/ ADDR4 /ADDR3/ ADDR2/ ADDR1/ ADDR0/Narrow Read/writeRead/write27TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.PORTE RegistersAddress Offset $0008Alt. Pin Function XCLKS/ MODB/ MODA LSTRB R/W IRQ XIRQ NOACC IPIPE1/ IPIE0 ECLK TAGLO SCGTO RCRTO PORTE - PORTE RegisterDDRE - PORTE Data Direction RegisterDDREx =0 pin is input =1 pin is outputAddress Offset $0009Reset: 0 0 0 0 0 0 0 0Reset: UnaffectedXCLKS - External Clock This pin is sampled on the rising edge of Reset to select the device clock source.NOACC - No Access This output signal indicates the current access is unused or free cycle.TAGLO - Instruction Low Byte Tagging This output signal may be used to tag the low byte of the instruction.28TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.PORTE AssignmentsPEAR - PORTE Assignment RegisterPORTE Assignment Register may be used to choose between bus control or GPI/O functions.NOACCE - CPU no Access Output Enable (Write once) 1 = Port E Pin 7 is output which indicates CPU free cycle 0 = Port E Pin 7 is GPI/O PIPOE - Pipe Status Signal Output Enable (Write once) 1 = Port E Pins[6:5] are used as IPIPE1 and IPIPE0 for instruction queue tracking 0 = Port E Pins[6:5] are used as GPI/ONECLK - No External E Clock (Write anytime) 1 = Port E Pin 4 used as GPI/O 0 = Port E Pin 4 is E Clock output pinLSTRE - Low Strobe(LSTRB) Enable (Write once) 1 = Port E Pin 3 is used as LSTRB bus control signal 0 = Port E Pin 3 is used as GPI/ORDWE - Read/Write Enable (Write once) 1 = Port E Pin 2 is configured as R/W bus control signal 0 = Port E Pin 2 Is configured as GPI/OReset: 0 0 0 0 0 0 0 0 Special single chipReset: 0 0 1 0 1 1 0 0 Special TestReset: 0 0 0 0 0 0 0 0 PeripheralReset: 1 0 1 0 1 1 0 0 Emulation Exp NarReset: 1 0 1 0 1 1 0 0 Emulation Exp WideReset: 0 0 0 1 0 0 0 0 Normal Single ChipReset: 0 0 0 0 0 0 0 0 Normal Exp NarReset: 0 0 0 0 0 0 0 0 Normal Exp WideAddress Offset $000A29TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.HCS12 Device IdentificationThe part ID is located in two 8-bit registers PARTIDH and PARTIDL. The read-only value is a unique part ID for each revision of the die. The coding is as follows:Bit 15-12: Major family identifierBit 11-8: Minor family identifierBit 7-4: Major mask set revision number including FAB transfersBit 3-0: Minor - non full - mask set revision30TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.HCS12 Memory IdentificationThe device memory sizes are located in two 8-bit registers MEMSIZ0 and MEMSIZ1.Also reference - EB386 “Family Compatibility Considerations” for information on how to configure a larger derivative to act as a smaller part.31TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.配置举例配置举例如何设置系统如何设置系统- 选择工作模式选择工作模式 (硬件硬件 / 软件软件)- 资源映射资源映射 (内部内部 / 外部外部)- 设置时钟设置时钟- 设置设置PIM- 初始化外设初始化外设…32TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.配置举例配置举例•创建一个带全局变量的工程文件•编译后，打开调试界面•在component菜单中打开一个新的Memory窗口•Memory：1窗口中修改0x0010：INITRM 09  49  40 89  80•Memory：2窗口中显示不同地址中的内容 1000  5000  4000 9000  8000•当INITRM的值改变时，变量在RAM中的位置也会改变33TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.在在component菜单中菜单中打开一个打开一个Memory窗口窗口34TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.Memory：：1窗口中窗口中修改修改0x0010：：INITRM09  49  40 89  80Memory：：2窗口中窗口中显示不同地址中的内容显示不同地址中的内容1000  5000  4000 9000  800035TMFreescale Semiconductor Confidential and Proprietary Information. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.36。

点击阅读更多内容