P83C524 datasheet(25/76 Pages) PHILIPS

25 / 76 page

1997 Dec 15

Philips Semiconductors

Product speciﬁcation

8-bit microcontrollers

P83C524; P80C528; P83C528

11.1.2

TIMER/COUNTER CONTROL REGISTER (TCON)

Table 7

Timer/Counter Control register (address 88H)

Table 8

Description of the TCON bits

76543210

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

BIT

SYMBOL

FUNCTION

TF1

Timer 1 overﬂow ﬂag: set by hardware on timer/counter overﬂow. Cleared when

interrupt is processed.

TR1

Timer 1 run control bit: set/cleared by software to turn timer/counter ON/OFF.

TF0

Timer 0 overﬂow ﬂag: set by hardware on timer/counter overﬂow. Cleared when

interrupt is processed.

TR0

Timer 0 run control bit: set/cleared by software to turn timer/counter ON/OFF.

IE1

Interrupt 1 edge ﬂag: set by hardware when external interrupt is detected. Cleared

when interrupt is processed.

IT1

Interrupt 1 type control bit: set/cleared by software to specify falling edge/LOW level

triggered external interrupt.

IE0

Interrupt 0 edge ﬂag: set by hardware when external interrupt is detected. Cleared

when interrupt is processed.

IT0

Interrupt 0 type control bit: set/cleared by software to specify falling edge/LOW level

triggered external interrupt.

P83C524 Datasheet(PDF) 25 Page - NXP Semiconductors

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