z89138 ZiLOG Semiconductor, z89138 Datasheet - Page 60

• Manufacturer Part Number: z89138
• Description: Voice Processing Controllers
• Manufacturer: ZiLOG Semiconductor

Z89138/Z89139
Voice Processing Controllers
Z8 CONTROL REGISTERS
60
R241 TMR
R240
R242 T1
D7 D6 D5 D4
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4
Figure 69. Counter/Timer 1 Register
Figure 68. Timer Mode Register
Figure 67. Reserved (F0H)
D3 D2 D1 D0
D3 D2 D1 D0
(F1H: Read/Write)
(F2H: Read/Write)
0 No Function
1 Load T1
TIN Modes
00 External Clock Input
01 Gate Input
10 Trigger Input
11 Trigger Input
0 No Function
1 Load T0
0 Disable T0 Count
1 Enable T0 Count
0 Disable T1 Count
1 Enable T1 Count
TOUT Modes
00 Not Used
01 T0 Out
10 T1 Out
11 Internal Clock Out (P36)
T1 Low Byte Initial Value
T1 Low Byte Current Value
(Non-retriggerable)
(Retriggerable)
(When Written)
(When Read)
RESERVED
P R E L I M I N A R Y
R243 PRE1
R244 T0
R243 PRE1
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2
D7 D6 D5
Figure 71. Counter/Timer 0 Register
Figure 70. Prescaler 1 Register
Figure 72. Prescaler 0 Register
D4 D3 D2 D1
(F4H: Read/Write)
(F3H: Write-Only)
(F5H: Write-Only)
D1
D0
D0
Clock Source
Clock Source
Count Mode
Prescaler Modulo
Count Mode
Prescaler Modulo
T0 Low Byte Initial Value
T0 Low Byte Current Value
(Range: 1-64 Decimal
01-00 HEX)
(Range: 1-64 Decimal
01-00 HEX)
1 T1Internal
0 T1External Timing Input
1 T1Internal
0 T1External Timing Input
0 T1 Single Pass
1 T1 Modulo N
0 T1 Single Pass
1 T1 Modulo N
(When Written)
(When Read)
(TIN) Mode
(TIN) Mode
DS97TAD0201
Zilog