Z87233 Datasheet, PDF (45/71 Pages) Zilog, Inc. – CMOS Z8-R MCU Consumer Controller Processor

Z87233
CMOS Z8“ MCU Consumer Controller Processor
39
Bit
Position
D4
Bit
Field
IRQ4
D3
IRQ3
D2
IRQ2
D1
IRQ1
D0
IRQ0
Reset
R/W State Description
R/W
0 Interrupt
IRQ4 = T0
0: No Interrupt pending
1: Interrupt pending
R/W
0 Interrupt
IRQ3 = P30 Input
0: No Interrupt pending
1: Interrupt pending
R/W
0 Interrupt
IRQ2 = P31 Input
0: No Interrupt pending
1: Interrupt pending
R/W
0 Interrupt
IRQ1 = P33 Input
0: No Interrupt pending
1: Interrupt pending
R/W
0 Interrupt
IRQ0 = P32 Input
0: No Interrupt pending
1: Interrupt pending
Interrupt Mask Register
The Interrupt Mask Register, IMR, controls interrupt functions. READ/WRITE and
reset states for bits D7–D0 are listed in Table 26.
Table 26. Interrupt Mask Register—IMR FBh/R251 Bank 0h: READ/WRITE
Bit
D7 D6 D5
R/W
R/W R/W R/W
Reset
0
X
X
Note: R = Read, W = Write, X = Indeterminate.
D4
R/W
X
D3
R/W
X
D2
D1
D0
R/W R/W R/W
X
X
X
PS022701-0104