參數(shù)資料
型號(hào)： μPD78F9177Y
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁數(shù)： 102/150頁
文件大?。?/td> 653K
代理商： ΜPD78F9177Y
Preliminary Product Information
100
μ
PD78F9177Y
(2) Interrupt mask flag registers (MK0 and MK1)
The interrupt mask flags are used to enable and disable the corresponding maskable interrupts.
MK0 and MK1 are manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input loads FFH into MK0 and MK1.
Figure 7-3. Format of Interrupt Mask Flag Register
Cautions 1. When the watchdog timer is being used in watchdog timer mode 1 or 2, any attempt to read
TMMK4 flag results in an undefined value being detected.
2. When port 3 is being used as an output port, and its output level is changed, an interrupt
request flag is set, because this port is also used as an external interrupt input. To use port
3 in output mode, therefore, the interrupt mask flag must be set to 1 in advance.
ADMK0
SMBOVMK0
SMBMK0
TMMK90
TMMK82TMMK81TMMK80
WTIMK
MK1
FFE5H
FFH
R/W
XXMKX
0
1
Interrupt handling control
Enable interrupt handling.
Disable interrupt handling.
6
7
5
4
3
2
1
0
WTMK
SRMK20
STMK20
PMK3 PMK2 PMK1 PMK0
TMMK4
MK0
Symbol
Address
When reset
R/W
FFE4H
FFH
R/W
6
7
5
4
3
2
1
0
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