Z87233 Datasheet, PDF (44/71 Pages) Zilog, Inc. – CMOS Z8-R MCU Consumer Controller Processor

Z87233
CMOS Z8“ MCU Consumer Controller Processor
38
Bit
Bit Position Field
D4,D3,D0 Interrupt
D2
IRQ0, IRQ2
D1
IRQ1, IRQ4
Reset
R/W State Description
W XXX Interrupt Group Priority
000: Reserved
001: C > A > B
010: A > B > C
011: A > C > B
100: B > C > A
101: C > B > A
110: B > A > C
111: Reserved
W
X IRQ0, IRQ2 Priority (Group B)
0: IRQ2 > IRQ0
1: IRQ0 > IRQ2
W
X IRQ1, IRQ4 Priority (Group C)
0: IRQ1 > IRQ4
1: IRQ4 > IRQ1
Interrupt Request Register
The Interrupt Request Register, IRQ, controls interrupt functions. READ/WRITE
and reset states for bits D7–D0 are listed in Table 25.
Table 25. Interrupt Request Register—IRQ FAh/R250 Bank 0h: READ/WRITE
Bit
D7
R/W
R/W
Reset
0
Note: R = Read, W = Write.
D6 D5
R/W R/W
0
0
D4
R/W
0
D3
R/W
0
D2
D1
D0
R/W R/W R/W
0
0
0
Bit
Position
D7–D6
Bit
Field
Interrupt
Edge
D5
IRQ5
Reset
R/W State Description
R/W 00 Interrupt Edge
00: P31 ↓ P32 ↓
01: P31 ↓ P32 ↑
10: P31 ↑ P32 ↓
11: P31 ↑↓ P32 ↑↓
R/W
0 Interrupt
IRQ5 = T1
0: No Interrupt pending
1: Interrupt pending
PS022701-0104