UPD17073 NEC, UPD17073 Datasheet - Page 69

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

11.2.2
that an interrupt is accepted, all the following three conditions must be satisfied:
reset
Interrupt enable register
At
Each interrupt enable flag enables or disables the interrupt request of the corresponding peripheral hardware. So
The interrupt enable flags are located on the interrupt enable registers on the register file.
Figure 11-5 shows the configuration and functions of the interrupt enable register.
• The interrupt must be enabled by the corresponding interrupt enable flag.
• The interrupt request must be issued from the corresponding interrupt request flag.
• The “EI” instruction (which enables all the interrupts) must be executed.
Power-ON
Clock stop
CE
Interrupt enable flag (IPxxx)
Name
b
0
0
Figure 11-5. Configuration of Interrupt Enable Register
3
Flag symbol
b
O
P
S
0
1
0
0
0
I
I
2
b
M
P
B
T
0
1
1
0
0
0
I
1
b
P
I
0
1
0
0
0
0
(BANK1)
Fixed to 0
Disables interrupt
Enables interrupt
Disables interrupt
Enables interrupt
Disables interrupt
Enables interrupt
Address
57H
Read/
Write
R/W
Enables interrupt from serial interface
Enables interrupt from basic timer 1
Enables interrupt from INT pin
PD17072,17073
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