SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 76

• Manufacturer Part Number: SAB80C517-M16
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 7-19
Special Function Register TCON (Address 88 H )
Bit
TR0
TF0
TR1
TF1
Each timer consists of two 8-bit registers (TH0 and TL0 for timer/counter 0, TH1 and TL1 for timer/
counter 1) which may be combined to one timer configuration depending on the mode that is
established. The functions of the timers are controlled by two special function registers TCON and
TMOD, shown in figures 7-19 and 7-20.
In the following descriptions the symbols TH0 and TL0 are used 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, this applies also to timer 1.
Semiconductor Group
88 H
8F H
TF1
These bits are not used in controlling timer/counter 0 and 1.
8E H
Function
Timer 0 run control bit.
Set/cleared by software to turn timer/counter 0 ON/OFF.
Timer 0 overflow flag. Set by hardware on timer/counter overflow.
Cleared by hardware when processor vectors to interrupt routine.
Timer 1 run control bit.
Set/cleared by software to turn timer/counter 1 ON/OFF.
Timer 1 overflow flag. Set by hardware on timer/counter overflow.
Cleared by hardware when processor vectors to interrupt routine.
TR1
8D H
TF0
8C H
TR0
77
8B H
IE1
On-Chip Peripheral Components
8A H
IT1
89 H
IE0
88 H
IT0
TCON