Z51F3220FNX Datasheet, PDF (101/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
EIFLAG1 (External Interrupt Flag 1 Register) : A6H
7
6
5
4
T0OVIFR
T0IFR
T3IFR
–
R/W
R/W
R/W
–
3
FLAG12
R/W
2
FLAG11
R/W
1
0
FLAG10
FLAG8
R/W
R/W
Initial value : 00H
T0OVIFR
T0IFR
T3IFR
EIFLAG1[3:0]
When T0 overflow interrupt occurs, this bit becomes ‘1’. For clearing
bit, write ‘0’ to this bit or automatically clear by INT_ACK signal.
0
T0 overflow Interrupt no generation
1
T0 overflow Interrupt generation
When T0 interrupt occurs, this bit becomes ‘1’. For clearing bit, write
‘0’ to this bit or automatically clear by INT_ACK signal.
0
T0 Interrupt no generation
1
T0 Interrupt generation
When T3 interrupt occurs, this bit becomes ‘1’. For clearing bit, write
‘0’ to this bit or automatically clear by INT_ACK signal.
0
T3 Interrupt no generation
1
T3 Interrupt generation
When an External Interrupt (EINT8, EINT10-EINT12) is occurred,
the flag becomes ‘1’. The flag is cleared by writing ‘0’ to the bit or
automatically cleared by INT_ACK signal.
0
External Interrupt not occurred
1
External Interrupt occurred
EIPOL1 (External Interrupt Polarity 1 Register): A7H
7
6
5
4
POL12
POL11
R/W
R/W
R/W
R/W
3
2
POL10
R/W
R/W
1
0
POL8
R/W
R/W
Initial value: 00H
EIPOL1[7:0]
External interrupt (EINT8,EINT10,EINT11,EINT12) polarity selection
POLn[1:0]
Description
0
0
No interrupt at any edge
0
1
Interrupt on rising edge
1
0
Interrupt on falling edge
1
1
Interrupt on both of rising and falling edge
Where n =8, 10, 11 and 12
PS029902-0212
PRELIMINARY
98