z89136 ZiLOG Semiconductor, z89136 Datasheet - Page 57

• Manufacturer Part Number: z89136
• Description: Low-cost Dtad Controller
• Manufacturer: ZiLOG Semiconductor

Zilog
Z8 CONTROL REGISTERS
DS97TAD0300
R242 T1
R241 TMR
D7 D6 D5 D4 D3 D2
D7 D6 D5
D7 D6 D5 D4 D3
Figure 66. Counter/Timer 1 Register
Figure 65. Timer Mode Register
D4 D3 D2 D1 D0
Figure 64. Reserved
(F1H: Read/Write)
(F2H: Read/Write)
D2 D1 D0
D1 D0
(F0H)
0 No Function
1 Load T1
TIN Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
11 Trigger Input
T1 Low Byte Initial Value
T1 Low Byte Current Value
0 No Function
1 Load T0
0 Disable T0 Count
1 Enable T0 Count
0 Disable T1 Count
1 Enable T1 Count
RESERVED
TOUT Modes
00 Not Used
01 T0 Out
10 T1 Out
11 Internal Clock Out (P36)
(When Written)
(When Read)
(Retriggerable)
(Non-retriggerable)
P R E L I M I N A R Y
R243 PRE1
R244 T0
R245 PRE0
D7 D6 D5
D7 D6 D5 D4 D3
D7 D6 D5
Figure 68. Counter/Timer 0 Register
Figure 67. Prescaler 1 Register
Figure 69. Prescaler 0 Register
D4 D3 D2 D1 D0
D4 D3 D2 D1
(F4H: Read/Write)
(F3H: Write Only)
D2 D1 D0
(F5H: Write Only)
D0
Low-Cost DTAD Controller
Z89135/136 (ROMless)
Count Mode
Clock Source
Prescaler Modulo
T0 Low Byte Initial Value
T0 Low Byte Current Value
Count Mode
Reserved
Prescaler Modulo
(Range: 1-64 Decimal
01-00 HEX)
(Range: 1-64 Decimal
01-00 HEX)
1 T1Internal
0 T0 Single Pass
1 T0 Modulo N
0 T1 Single Pass
1 T1 Modulo N
0 T1External Timing Input
(When Written)
(When Read)
(TIN) Mode
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