Z86319 datasheet(19/23 Pages) ZILOG

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Z86319

Zilog

PS/2 Mouse Controller

DS97KEY1605

P R E L I M I N A R Y

Z8 CONTROL REGISTERS

Figure 20. Timer Mode Register

(F1H: Read/Write)

Figure 21. Counter Timer 1 Register

(F2H: Read/Write)

Figure 22. Prescaler 1 Register

(F3H: Write Only)

D7 D6

D3 D2

0 Disable T0 Count

1 Enable T0 Count

0 No Function

1 Load T0

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)

R241 TMR

T1 Initial Value

(When Written)

(Range 1-256 Decimal

01-00 HEX)

T1 Current Value

(When READ)

R242 T1

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)

R243 PRE1

Figure 23. Counter/Timer 0 Register

(F4H: Read/Write)

Figure 24. Prescaler 0 Register

(F5H: Write Only)

Figure 25. Port 2 Mode Register

(F6H: Write Only)

Figure 26. Port 3 Mode Register

(F7H: Write Only)

T0 Initial Value

(When Written)

(Range: 1-256 Decimal

01-00 HEX)

T0 Current Value

(When READ)

R244 T0

0 T0 Single Pass

1 T0 Modulo N

D5 D4

Count Mode

Reserved (Must be 0)

Prescaler Modulo

(Range: 1-64 Decimal

01-00 HEX)

R245 PRE0

P27- P20 I/O Definition

0 Defines Bit as OUTPUT

1 Defines Bit as INPUT

R246 P2M

Port 2 Open-Drain

Port 2 Push-Pull

D7 D6

D3 D2

Reserved (Must be 0)

R247 P3M

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