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: 57/96页
文件大小: 482K
代理商: MPD789322
Preliminary Product Information U14673EJ1V0PM00
60
PD789322,789324,789326,789327
(1) Interrupt request flag register 0 (IF0)
An interrupt request flag is set (1) when the corresponding interrupt request is generated, or when an
instruction is executed. It is cleared (0) when the interrupt request is acknowledged, when the RESET signal
is input, or when an instruction is executed.
IF0 is set using a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Figure 6-2. Format of Interrupt Request Flag Register 0
Symbol
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
Address
After reset
R/W
IF0
WTIIF
KRIF00
TMIF40
TMIF30
WTIF
CSIIF0
PIF0
WDTIF
FFE0H
00H
R/W
××IF×
Interrupt request flag
0
No interrupt request signal generated
1
An interrupt request signal is generated and an interrupt request made
Cautions 1. The WDTIF flag can be read/written only when the watchdog timer is being used as an
interval timer. It must be cleared to 0 if the watchdog timer is used in watchdog timer
mode 1 or 2.
2. Because P61 functions alternately as an external interrupt, when the output level
changes after the output mode of the port function is specified, the interrupt request flag
will be inadvertently set. Therefore, be sure to preset the interrupt mask flag (PMK0)
before using the port in output mode.
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