P80C31X2 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

View to exact match

P80C31X2

80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

NXP Semiconductors. 

Philips Semiconductors

80C51 8-bit microcontroller family

4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),

low power, high speed (30/33 MHz)

Product data

P80C3xX2; P80C5xX2;

P87C5xX2

TCON

Address = 88H

Bit Addressable

Reset Value = 00H

7

6

5

4

3

2

1

0

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

BIT

TCON.7

TCON.6

TCON.5

TCON.4

TCON.3

TCON.2

TCON.1

TCON.0

SYMBOL

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

FUNCTION

Timer 1 overflow flag. Set by hardware on Timer/Counter overflow.

Cleared by hardware when processor vectors to interrupt routine, or clearing the bit in software.

Timer 1 Run control bit. Set/cleared by software to turn Timer/Counter on/off.

Timer 0 overflow flag. Set by hardware on Timer/Counter overflow.

Cleared by hardware when processor vectors to interrupt routine, or by clearing the bit in software.

Timer 0 Run control bit. Set/cleared by software to turn Timer/Counter on/off.

Interrupt 1 Edge flag. Set by hardware when external interrupt edge detected.

Cleared when interrupt processed.

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

external interrupts.

Interrupt 0 Edge flag. Set by hardware when external interrupt edge detected.

Cleared when interrupt processed.

Interrupt 0 Type control bit. Set/cleared by software to specify falling edge/low level

triggered external interrupts.

SU01516

Figure 3. Timer/Counter 0/1 Control (TCON) Register

OSC

÷ d*

Tn Pin

C/T = 0

C/T = 1

TRn

Timer n

Gate bit

INTn Pin

*d = 6 in 6-clock mode; d = 12 in 12-clock mode.

Control

TLn

(8 Bits)

Reload

THn

(8 Bits)

Figure 4. Timer/Counter 0/1 Mode 2: 8-Bit Auto-Reload

TFn

Interrupt

SU01619

2003 Jan 24

16

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