C517A_99 Datasheet, PDF (82/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C517A
Special Function Register TCON (Address 88H)
Reset Value : 00H
Bit No.
88H
MSB
7
8FH
TF1
6
8EH
TR1
5
8DH
TF0
4
8CH
TR0
3
8BH
IE1
2
8AH
IT1
LSB
1
0
89H 88H
IE0 IT0 TCON
The shaded bits are not used in controlling timer/counter 0 and 1.
Bit
Function
TR0
Timer 0 run control bit
Set/cleared by software to turn timer/counter 0 ON/OFF.
TF0
Timer 0 overflow flag
Set by hardware on timer/counter overflow.
Cleared by hardware when processor vectors to interrupt routine.
TR1
Timer 1 run control bit
Set/cleared by software to turn timer/counter 1 ON/OFF.
TF1
Timer 1 overflow flag
Set by hardware on timer/counter overflow.
Cleared by hardware when processor vectors to interrupt routine.
Semiconductor Group
6-16