Z86E61 Zilog., Z86E61 Datasheet - Page 32

• Manufacturer Part Number: Z86E61
• Description: CMOS Z8 16K/32K EPROM MICROCONTROLLER
• Manufacturer: Zilog.

Z8 CONTROL REGISTER DIAGRAMS (Continued)
32
R246 P2M
R247 P3M
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Figure 34. Port 2 Mode Register
Figure 35. Port 3 Mode Register
(F6
(F7
H
H
: Write Only)
: Write Only)
P2
0 Port 2 Pull-Ups Open Drain
1 Port 2 Pull-Ups Active
Reserved (Must be 0)
0 P32 = Input
1 P32 = /DAV0/RDY0
0
1
00
01
10
11
0 P31 = Input (TIN)
1 P31 = /DAV2/RDY2
0 Parity Off
1 Parity On
0
1
0
P35 = Output
P35 = RDY0//DAV0
P36 = Output (TOUT)
P36 = RDY2//DAV2
- P2
P30 = Input
P37 = Output
P30 = Serial In
P37 = Serial Out
Defines Bit as Output
Defines Bit as Input
P33 = /DAV1/RDY1
P33 = Input
P34 = Output
P33 = Input
P34 = /DM
P34 = RDY1//DAV1
7
I/O Definition
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
(F8
(F9
H
H
: Write Only)
: Write Only)
Interrupt Group Priority
IRQ1, IRQ4 Priority (Group C)
IRQ0, IRQ2 Priority (Group B)
IRQ3, IRQ5 Priority (Group A)
Reserved (Must be 0)
P0
Stack Selection
P1
Reserved (Must be 0)
P0
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 = 110
Reserved = 111
0
1
0
1
0
1
00
01
10 AD
11
00
01
1X A
0
1
00
01
1X A
7
0
7
- P1
- P0
- P0
IRQ1 > IRQ4
IRQ4 > IRQ1
IRQ2 > IRQ0
IRQ0 > IRQ2
IRQ5 > IRQ3
IRQ3 > IRQ5
External
Internal
High-Impedance AD
A
Byte Output
Byte Input
/AS, /DS, /R//W, A
Output
Input
Output
Input
15
0
0
11
4
15
7
WITH
Mode
Mode
Mode
Z86E61/E63 Z8
- A
- A
- AD
- A
12
8
12
, If Selected
16K/32K EPROM
0
11
7
®
- A
- DA
MCU
8
,
0
,