AT89C5132-ROTIL datasheet(54/181 Pages) ATMEL

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4173D–USB–02/06

AT89C5132

12.6

Registers

Table 40. TCON Register

TCON (S:88h) – Timer/Counter Control Register

Reset Value = 0000 0000b

Table 41. TMOD Register

TMOD (89:h) - Timer/Counter 0 and 1 Modes

765

4321

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

Bit Number

Bit

Mnemonic

Description

7TF1

Timer 1 Overflow Flag

Cleared by hardware when processor vectors to interrupt routine.

Set by hardware on Timer/Counter overflow, when Timer 1 register overflows.

6TR1

Timer 1 Run Control Bit

Clear to turn off Timer/Counter 1.

Set to turn on Timer/Counter 1.

5TF0

Timer 0 Overflow Flag

Cleared by hardware when processor vectors to interrupt routine.

Set by hardware on Timer/Counter overflow, when Timer 0 register overflows.

4TR0

Timer 0 Run Control Bit

Clear to turn off Timer/Counter 0.

Set to turn on Timer/Counter 0.

3IE1

Interrupt 1 Edge Flag

Cleared by hardware when interrupt is processed if edge-triggered (see IT1).

Set by hardware when external interrupt is detected on INT1 pin.

2IT1

Interrupt 1 Type Control Bit

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.

1IE0

Interrupt 0 Edge Flag

Cleared by hardware when interrupt is processed if edge-triggered (see IT0).

Set by hardware when external interrupt is detected on INT0 pin.

0IT0

Interrupt 0 Type Control Bit

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.

543

210

GATE1

C/T1#

M11

M01

GATE0

C/T0#

M10

M00

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