参数资料
型号: M38K27M4L-XXXHP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件页数: 11/151页
文件大小: 1403K
代理商: M38K27M4L-XXXHP
38K2 Group
Rev.3.00
Oct 15, 2006
page 108 of 147
REJ03B0193-0300
Functions To Inhibit Rewriting Flash Memory
Version
To prevent the contents of internal flash memory from being read
out or rewritten easily, this MCU incorporates a ROM code protect
function for use in parallel I/O mode and an ID code check func-
tion for use in standard serial I/O mode.
qROM Code Protect Function
The ROM code protect function is the function to inhibit reading
out or modifying the contents of internal flash memory by using
the ROM code protect control register (address FFDB16) in paral-
lel I/O mode. Figure 152 shows the ROM code protect control
register (address FFDB16). (This address exists in the User ROM
area.)
If one or both of the pair of ROM Code Protect Bits is set to “0”,
the ROM code protect is turned on, so that the contents of internal
flash memory are protected against readout and modification. The
ROM code protect is implemented in two levels. If level 2 is se-
lected, the flash memory is protected even against readout by a
shipment inspection LSI tester, etc. When an attempt is made to
select both level 1 and level 2, level 2 is selected by default.
If both of the two ROM Code Protect Reset Bits are set to “00”, the
ROM code protect is turned off, so that the contents of internal
flash memory can be read out or modified. Once the ROM code
protect is turned on, the contents of the ROM Code Protect Reset
Bits cannot be modified in parallel I/O mode. Use the serial I/O or
CPU rewrite mode to rewrite the contents of the ROM Code Pro-
tect Reset Bits.
Fig. 152 Structure of ROM code protect control register
ROM code protect control register (address FFDB16)
ROMCP
Reserved bits (“1” at read/write)
ROM code protect level 2 set bits (ROMCP2) (Notes 1, 2)
b3b2
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
ROM code protect reset bits (Note 3)
b5b4
0 0: Protect removed
0 1: Protect set bits effective
1 0: Protect set bits effective
1 1: Protect set bits effective
ROM code protect level 1 set bits (ROMCP1) (Note 1)
b7b6
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
b0
b7
Notes 1: When ROM code protect is turned on, the internal flash memory is protected
against readout or modification in parallel I/O mode.
2: When ROM code protect level 2 is turned on, ROM code readout by a shipment
inspection LSI tester, etc. also is inhibited.
3: The ROM code protect reset bits can be used to turn off ROM code protect level 1
and ROM code protect level 2. However, since these bits cannot be modified in
parallel I/O mode, they need to be rewritten in serial I/O mode or CPU rewrite
mode.
相关PDF资料
PDF描述
M30302MC-XXXFP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
M37480E8-XXXSP 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP32
M38034M4H-XXXFP 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
M30201F6FP 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP56
M30620MCP-XXXGP 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP100
相关代理商/技术参数
参数描述
M38K29F8LHP 功能描述:IC 740 MCU FLASH 32K 64LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:740/38000 产品培训模块:MCU Product Line Introduction XMEGA Introduction AVR XMEGA USB Connectivity 标准包装:90 系列:AVR® XMEGA 核心处理器:AVR 芯体尺寸:8/16-位 速度:32MHz 连通性:I²C,IrDA,SPI,UART/USART 外围设备:欠压检测/复位,DMA,POR,PWM,WDT 输入/输出数:50 程序存储器容量:192KB(96K x 16) 程序存储器类型:闪存 EEPROM 大小:4K x 8 RAM 容量:16K x 8 电压 - 电源 (Vcc/Vdd):1.6 V ~ 3.6 V 数据转换器:A/D 16x12b; D/A 2x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:64-TQFP 包装:托盘 配用:ATSTK600-RC14-ND - STK600 SOCKET/ADAPTER 64TQFPATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFPATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMRATAVRISP2-ND - PROGRAMMER AVR IN SYSTEM
M38K29F8LHP#U0 功能描述:IC 740/38K2 MCU FLASH 64-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:740/38000 产品培训模块:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 标准包装:1 系列:M16C™ M32C/80/87 核心处理器:M32C/80 芯体尺寸:16/32-位 速度:32MHz 连通性:EBI/EMI,I²C,IEBus,IrDA,SIO,UART/USART 外围设备:DMA,POR,PWM,WDT 输入/输出数:121 程序存储器容量:384KB(384K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:24K x 8 电压 - 电源 (Vcc/Vdd):3 V ~ 5.5 V 数据转换器:A/D 34x10b,D/A 2x8b 振荡器型:内部 工作温度:-20°C ~ 85°C 封装/外壳:144-LQFP 包装:托盘 产品目录页面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87
M38K29F8LHP#UO 制造商:Renesas Electronics Corporation 功能描述:
M38K29T-ADF 功能描述:DEV TEMPORARY TARGET BOARD FOR M RoHS:否 类别:编程器,开发系统 >> 配件 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 标准包装:1 系列:- 附件类型:USB 至 1-Wire? RJ11 适配器 适用于相关产品:1-Wire? 设备 产品目录页面:1429 (CN2011-ZH PDF)
M38K29T-PAC 制造商:Renesas Electronics Corporation 功能描述:DEV SIMPLE TOOL SYSTEM PKG FOR 38000/38K - Bulk