C509-L_97 Datasheet, PDF (101/290 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C509-L
The 4 registers TL0, TH0, TL1, and TH1 are the count/reload registers of the timer 0 and 1:
Special Function Registers TL0/TH0 (Addresses 8AH/8CH)
Special Function Registers TL1/TH1 (Addresses 8BH/8DH)
Bit No. MSB
7
6
5
4
3
2
8AH
.7
.6
.5
.4
.3
.2
8CH
.7
.6
.5
.4
.3
.2
Reset Value : 00H
Reset Value : 00H
LSB
1
0
.1
.0 TL0
.1
.0 TH0
8BH
.7
.6
.5
.4
.3
.2
.1
.0 TL1
8DH
.7
.6
.5
.4
.3
.2
.1
.0 TH1
Bit
TL0.7 - 0
TH0.7 - 0
TL1.7 - 0
TH1.7 - 0
Function
Timer 0 low byte
The TL0 is the 8-bit low byte count register of timer 0.
Timer 0 high byte
The TH0 is the 8-bit high byte count/reload register of timer 0.
Timer 1 low byte
The TL1 is the 8-bit low byte count register of timer 1.
Timer 1 high byte
The TH1 is the 8-bit high byte count/reload register of timer 1.
In the following sections the symbols TH0 and TL0 are used to specify the high-byte and low-byte
of timer 0 (TH1 and TL1 for timer 1, respectively). The operating modes are described and shown
for timer 0. If not explicitly noted, the operating modes are also valid for timer 1.
Semiconductor Group
6-23
1997-10-01