P80C557E6EBB 查看數據表（PDF） - Philips Electronics

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P80C557E6EBB

Single-chip 8-bit microcontroller

Philips Electronics 

Philips Semiconductors

Single-chip 8-bit microcontroller

Product specification

P83C557E6/P80C557E6

TCON (88H)

7

6

5

4

3

2

TF1

TR1

TF0

TR0

IE1

IT1

1

0

IE0

IT0

Figure 20. Timer/Counter mode control (TCON) register.

Table 14. Description of TCON bits

SYMBOL

BIT

FUNCTION

TF1

TCON.7 Timer 1 overflow flag. Set by hardware on Timer/Counter overflow. Cleared by hardware when processor

vectors to interrupt routine.

TR1

TCON.6 Timer 1 run control bit. Set/cleared by software to turn Timer/Counter on/off.

TF0

TCON.5 Timer 0 overflow flag. Set by hardware on Timer/Counter overflow. Cleared by hardware when processor

vectors to interrupt routine.

TR0

TCON.4 Timer 0 run control bit. Set/cleared by software to turn Timer/Counter on/off.

IE1

TCON.3 Interrupt 1 edge flag. Set by hardware when external interrupt edge detected. Cleared when interrupt

processed.

IT1

TCON.2 Interrupt 1 type control bit. Set/cleared by software to specify falling edge/low level triggered external interrupts.

IE0

TCON.1 Interrupt 0 edge flag. Set by hardware when external interrupt edge detected. Cleared when interrupt

processed.

IT0

TCON.0 Interrupt 0 type control bit. Set/cleared by software to specify falling edge/low level triggered external interrupts.

1999 Mar 02

23

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