AT89C5131A-PUTUM(2008) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C5131A-PUTUM
(Rev.:2008)

8-bit Flash Microcontroller with Full Speed USB Device

Atmel Corporation 

AT89C5130A/31A-M

Signal

Name

Type Description

CEX[4:0]

Capture External Input

I/O

Compare External Output

Alternate

Function

P1.3

P1.4

P1.5

P1.6

P1.7

Table 3-3. Serial I/O Signal Description

Signal

Name Type Description

RxD

I Serial Input Port

TxD

O Serial Output Port

Alternate

Function

P3.0

P3.1

Table 3-4. Timer 0, Timer 1 and Timer 2 Signal Description

Signal

Name Type Description

Alternate

Function

INT0

Timer 0 Gate Input

INT0 serves as external run control for timer 0, when selected by GATE0

bit in TCON register.

I External Interrupt 0

INT0 input set IE0 in the TCON register. If bit IT0 in this register is set, bits

IE0 are set by a falling edge on INT0. If bit IT0 is cleared, bits IE0 is set by

a low level on INT0.

P3.2

INT1

Timer 1 Gate Input

INT1 serves as external run control for Timer 1, when selected by GATE1

bit in TCON register.

I External Interrupt 1

INT1 input set IE1 in the TCON register. If bit IT1 in this register is set, bits

IE1 are set by a falling edge on INT1. If bit IT1 is cleared, bits IE1 is set by

a low level on INT1.

P3.3

Timer Counter 0 External Clock Input

T0

I When Timer 0 operates as a counter, a falling edge on the T0 pin

increments the count.

P3.4

Timer/Counter 1 External Clock Input

T1

I When Timer 1 operates as a counter, a falling edge on the T1 pin

increments the count.

P3.5

I Timer/Counter 2 External Clock Input

T2

O Timer/Counter 2 Clock Output

P1.0

T2EX

I Timer/Counter 2 Reload/Capture/Direction Control Input

P1.1

7

4337K–USB–04/08

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