Z86E61 Datasheet, PDF (31/44 Pages) Zilog, Inc. – CMOS Z8 16K/32K EPROM MICROCONTROLLER

PRELIMINARY
Z8 CONTROL REGISTER DIAGRAMS
R240 SIO
D7 D6 D5 D4 D3 D2 D1 D0
R243 PRE1
D7 D6 D5 D4 D3 D2 D1 D0
Z86E61/E63 Z8^® MCU
WITH 16K/32K EPROM
Serial Data (D0 = LSB)
Figure 28. Serial I/O Register
(F0 : Read/Write)
H
R241 TMR
D7 D6 D5 D4 D3 D2 D1 D0
0 No Function
1 Load T0
0 Disable T0 Count
1 Enable T0 Count
0 No Function
1 Load T1
0 Disable T1 Count
1 Enable T1 Count
TIN Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
(Non-retriggerable)
11 Trigger Input
(Retriggerable)
TOUT Modes
00 Not Used
01 T0 Out
10 T1 Out
11 Internal Clock Out
Figure 29. Timer Mode Register
(F1 : Read/Write)
H
R242 T1
D7 D6 D5 D4 D3 D2 D1 D0
T1 Initial Value
(When Written)
(Range: 1-256 Decimal
01-00 HEX)
T1 Current Value
(When Read)
Figure 30. Counter/Timer 1 Register
(F2 : Read/Write)
H
Count Mode
0 T1 Single Pass
1 T1 Modulo N
Clock Source
1 T1 Internal
0 T1 External Timing Input
(TIN) Mode
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
Figure 31. Prescaler 1 Register
(F3 : Write Only)
H
R244 T0
D7 D6 D5 D4 D3 D2 D1 D0
T0 Initial Value
(When Written)
(Range: 1-256 Decimal
01-00 HEX)
T0 Current Value
(When Read)
Figure 32. Counter/Timer 0 Register
(F4 : Read/Write)
H
R245 PRE0
D7 D6 D5 D4 D3 D2 D1 D0
Count Mode
0 T0 Single Pass
1 T0 Modulo N
Reserved (Must be 0)
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
Figure 33. Prescaler 0 Register
(F5 : Write Only)
H
31