参数资料
型号: M38514E6-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, 0.80 MM PITCH, PLASTIC, SSOP-42
文件页数: 51/93页
文件大小: 1137K
代理商: M38514E6-XXXFP
Rev.1.01
Oct 15, 2003
page 53 of 89
3851 Group (Built-in 24 KB or more ROM)
Precautions on CPU Rewrite Mode
Described below are the precautions to be observed when rewriting
the flash memory in CPU rewrite mode.
(1) Operation speed
During CPU rewrite mode, set the internal clock frequency 4.0
MHz or less using the main clock division ratio selection bits (bit
6, 7 at 003B16).
(2) Instructions inhibited against use
The instructions which refer to the internal data of the flash
memory cannot be used during CPU rewrite mode .
(3) Interrupts inhibited against use
The interrupts cannot be used during CPU rewrite mode be-
cause they refer to the internal data of the flash memory.
(4) Watchdog timer
In case of the watchdog timer has been running already, the in-
ternal reset generated by watchdog timer underflow does not
happen, because of watchdog timer is always clearing during
program or erase operation.
(5) Reset
Reset is always valid. In case of CNVSS = H when reset is re-
leased, boot mode is active. So the program starts from the ad-
dress contained in address FFFC16 and FFFD16 in boot ROM
area.
相关PDF资料
PDF描述
M38227MCHXXXHP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP80
M38B79FFFP 8-BIT, FLASH, 4.2 MHz, MICROCONTROLLER, PQFP100
MB96F346YWAXXXPMC-GSE2 16-BIT, FLASH, 56 MHz, RISC MICROCONTROLLER, PQFP100
M30221M8-XXXFP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP120
M37470M4-XXXSP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
相关代理商/技术参数
参数描述
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'
M3852 BK002 制造商:Alpha Wire 功能描述:CBL 8COND 14AWG BLK 500'
M3852 BK005 制造商:Alpha Wire 功能描述:CBL 8COND 14AWG BLK 100'