z86c96 ZiLOG Semiconductor, z86c96 Datasheet - Page 36

• Manufacturer Part Number: z86c96
• Description: Cmos Z8 Microcontroller
• Manufacturer: ZiLOG Semiconductor

Z8 CONTROL REGISTER DIAGRAMS (Continued)
Z86C61/62/96
CMOS Z8 Microcontroller
36
R247 P3M
D7 D6 D5 D4 D3 D2 D1 D0
R246 P2M
D7 D6 D5 D4 D3 D2 D1 D0
Figure 34. Port 2 Mode Register
Figure 35. Port 3 Mode Register
(F6H: Write Only)
(F7H: Write Only)
P2
0 Port 2 Open Drain
1 Port 2 Push-pull
Reserved (Must be 0)
0 P32 = Input
1 P32 = /DAV0/RDY0
00
01
10
0 P31 = Input (TIN)
1 P31 = /DAV2/RDY2
11
0
1
0 Parity Off
1 Parity On
0
1
0
- P2
P35 = Output
P35 = RDY0//DAV0
P36 = Output (TOUT)
P36 = RDY2//DAV2
P30 = Input
P37 = Output
P30 = Serial In
P37 = Serial Out
Defines Bit as Output
Defines Bit as Input
P33 = Input
P34 = Output
P33 = Input
P34 = /DM
P33 = /DAV1/RDY1
P34 = RDY1//DAV1
7
I/O Definition
PS003501-0301
P R E L I M I N A R Y
R248 P01M
R249 IPR
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Figure 36. Port 0 and 1 Mode Register
Figure 37. Interrupt Priority Register
(F8H: Write Only)
(F9H: Write Only)
P0
Stack Selection
P1
Reserved (Must be 0)
P0
00
01
10 AD
11
Interrupt Group Priority
IRQ1, IRQ4 Priority (Group C)
IRQ0, IRQ2 Priority (Group B)
IRQ3, IRQ5 Priority (Group A)
Reserved (Must be 0)
00
01
1X A
0
1
00
01
1X A
7
0
7
Reserved = 000
C > A > B = 001
A > B > C = 010
A > C > B = 011
B > C > A = 100
C > B > A = 101
B > A > C = 1 10
Reserved = 1 11
0
1
0
1
0
1
- P1
- P0
- P0
External
Internal
High-Impedance AD
A
/AS, /DS, /R//W, A
Output
Input
Byte Output
Byte Input
Output
Input
IRQ1 > IRQ4
IRQ4 > IRQ1
IRQ2 > IRQ0
IRQ0 > IRQ2
IRQ5 > IRQ3
IRQ3 > IRQ5
15
0
1 1
0
4
15
7
Mode
Mode
Mode
- A
- A
- AD
- A
12
8
DS97Z8X1600
12
, If Selected
0
11
7
- A
Zilog
- DA
8
,
0
,