T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 55

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

12.6. Registers
TCON (S:88h)
Timer/Counter Control Register.
Reset Value= 0000 0000b
Rev.A - May 17, 2001
Bit Number Bit Mnemonic
TF1
7
7
6
5
4
3
2
1
0
TR1
TR1
TR0
TF1
TF0
IE1
IT1
IE0
IT0
6
Timer 1 Overflow Flag
Timer 1 Run Control Bit
Timer 0 Overflow Flag
Timer 0 Run Control Bit
Interrupt 1 Edge Flag
Interrupt 1 Type Control Bit
Interrupt 0 Edge Flag
Interrupt 0 Type Control Bit
Cleared by hardware when processor vectors to interrupt routine.
Set by hardware on Timer/Counter overflow, when Timer 1 register overflows.
Clear to turn off Timer/Counter 1.
Set to turn on Timer/Counter 1.
Cleared by hardware when processor vectors to interrupt routine.
Set by hardware on Timer/Counter overflow, when Timer 0 register overflows.
Clear to turn off Timer/Counter 0.
Set to turn on Timer/Counter 0.
Cleared by hardware when interrupt is processed if edge-triggered (see IT1).
Set by hardware when external interrupt is detected on INT1# pin.
Clear to select low level active (level triggered) for external interrupt 1 (INT1#).
Set to select falling edge active (edge triggered) for external interrupt 1.
Cleared by hardware when interrupt is processed if edge-triggered (see IT0).
Set by hardware when external interrupt is detected on INT0# pin.
Clear to select low level active (level triggered) for external interrupt 0 (INT0#).
Set to select falling edge active (edge triggered) for external interrupt 0.
TF0
5
Figure 39. TCON Register
Preliminary
TR0
4
IE1
3
Description
IT1
2
T89C51CC02
IE0
1
IT0
0
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