C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 100

• Manufacturer Part Number: C509-L_97
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

The 4 lower bits of special function register PRSC control the timer 0/1 input clock prescaler
operation.
Special Function Register PRSC (Address B4 H )
Bit
T1P1
T1P0
T0P1
T0P0
Semiconductor Group
Bit No.
B4 H
The shaded bits are not used for timer/counter 0 and 1.
WDTP
Function
Prescaler select bits for timer 1
Prescaler select bits for timer 0
MSB
T1P1
0
0
1
1
T0P1
0
0
1
1
7
S0P
6
T1P0
0
1
0
1
T0P0
0
1
0
1
T2P1
5
T2P0
Divider Ratio
1 : 1
1 : 2 (reset value)
1 : 4
1 : 8
Divider Ratio
1 : 1
1 : 2 (reset value)
1 : 4
1 : 8
4
6-22
Timer 1 Control
T1P1
3
On-Chip Peripheral Components
T1P0
2
Timer 0 Control
T0P1
1
Reset Value : 11010101 B
T0P0
LSB
0
PRSC
1997-10-01
C509-L