- 您现在的位置：买卖IC网 > PDF目录80570 > M38513M4-XXXFP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO42 PDF资料下载
参数资料
| 型号： | M38513M4-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO42 |
| 封装： | 0.450 INCH, PLASTIC, SSOP-42 |
| 文件页数： | 54/91页 |
| 文件大小： | 1295K |
| 代理商： | M38513M4-XXXFP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页当前第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页
58
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3851 Group
(Built-in 24 KB or more ROM)
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 (in Parallel I/O Mode)
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 (address FFDB16) in parallel I/O
mode. Figure 63 shows the ROM code protect control (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. 63 Structure of ROM code protect control
ROM code protect control register (address FFDB16) (Note 1)
ROMCP
Reserved bits (“1” at read/write)
ROM code protect level 2 set bits (ROMCP2) (Notes 2, 3)
b3b2
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
ROM code protect reset bits (Note 4)
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 2)
b7b6
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
b0
b7
Notes 1: This area is on the ROM in the mask ROM version.
2: When ROM code protect is turned on, the internal flash memory is protected
against readout or modification in parallel I/O mode.
3: When ROM code protect level 2 is turned on, ROM code readout by a shipment
inspection LSI tester, etc. also is inhibited.
4: 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 standard serial I/O mode or CPU
rewrite mode.
1
相关PDF资料 |
PDF描述 |
|---|---|
| M30620SFP | 16-BIT, 16 MHz, MICROCONTROLLER, PQFP100 |
| MSU2051C16-YYYJ | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| MC68LK332GCFC16 | 32-BIT, 16.78 MHz, MICROCONTROLLER, PQFP132 |
| ML9203-XXGA | 16 X 35 DOTS FLUORESCENT DSPL CTRL, PQFP100 |
| M8813F2Y-15T1T | 128K X 8 FLASH, 27 I/O, PIA-GENERAL PURPOSE, PQFP52 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M38514E6FP | 制造商:Renesas Electronics Corporation 功能描述:SLIM740 OTP 24K/640B RAM, W/A-D, I2C, L - Rail/Tube |
| M38514E6SP | 制造商:Renesas Electronics Corporation 功能描述:SLIM740 OTP 24K/640B RAM, W/A-D, I2C, L - Rail/Tube |
| M38517T-ADS | 功能描述:DEV TMP TRGT BRD FOR M38517RSS & RoHS:否 类别:编程器，开发系统 >> 配件 系列:- 标准包装:1 系列:- 附件类型:适配器板 适用于相关产品:RCB230，RCB231，RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE |
| M38517T-PAC | 功能描述:DEV SIMPLE TOOL EMULATOR FOR M38 RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:- 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| M3852 BK001 | 制造商:Alpha Wire 功能描述:CBL 8COND 14AWG BLK 1000' |
发布紧急采购，3分钟左右您将得到回复。