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Z86319 Datasheet, PDF (19/23 Pages) Zilog, Inc. – PS/2 MOUSE CONTROLLER
Zilog
Z8 CONTROL REGISTERS
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)
Reserved (Must be 0)
Figure 20. Timer Mode Register
(F1H: Read/Write)
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 21. Counter Timer 1 Register
(F2H: Read/Write)
R243 PRE1
D7 D6 D5 D4 D3 D2 D1 D0
Count Mode
0 T1 Single Pass
1 T1 Modulo
Clock Source
1 T1 Internal
0 T1 External Timing Input
(TIN) Mode
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
Figure 22. Prescaler 1 Register
(F3H: Write Only)
Z86319
PS/2 Mouse Controller
R244 T0
1
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 23. Counter/Timer 0 Register
(F4H: Read/Write)
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 24. Prescaler 0 Register
(F5H: Write Only)
R246 P2M
D7 D6 D5 D4 D3 D2 D1 D0
P27- P20 I/O Definition
0 Defines Bit as OUTPUT
1 Defines Bit as INPUT
Figure 25. Port 2 Mode Register
(F6H: Write Only)
R247 P3M
D7 D6 D5 D4 D3 D2 D1 D0
0 Port 2 Open-Drain
1 Port 2 Push-Pull
Reserved (Must be 0)
Figure 26. Port 3 Mode Register
(F7H: Write Only)
DS97KEY1605
PRELIMINARY
19