参数资料
型号: mPD789322
厂商: NEC Corp.
元件分类: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器与2/4/8K字节在系统可编程闪存
文件页数: 68/96页
文件大小: 482K
代理商: MPD789322
Preliminary Product Information U14673EJ1V0PM00
70
PD789322,789324,789326,789327
8.2 Power Failure Detection Function
When a reset is generated via the power-on-clear circuit, bit 2 (POCOF1) of the power-on-clear register (POCF1)
is set (1). This bit is then cleared (0) by an instruction written to POCF1. After a power-on-clear reset (i.e. after
program execution has started from address 0000H), a power failure can be detected by detecting POCOF1.
Figure 8-2. Format of Power-on-Clear Register 1
Symbol
7
6
5
4
3
2
1
0
Address
After reset
R/W
POCF1
0
POCOF1
0
FFDDH
00H
Note
R/W
POCOF1
Power-on-clear generation status detection
0
Power-on-clear not generated, or cleared by write operation
1
Power-on-clear reset generated
Note The value is 04H only after a power-on-clear reset.
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