AT89C5131A-PUTUM(2008) データシートの表示（PDF） - Atmel Corporation

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AT89C5131A-PUTUM
(Rev.:2008)

8-bit Flash Microcontroller with Full Speed USB Device

Atmel Corporation 

Table 3-5. LED Signal Description

Signal

Name

Type Description

Alternate

Function

LED[3:0]

Direct Drive LED Output

These pins can be directly connected to the Cathode of standard LEDs

O without external current limiting resistors. The typical current of each

output can be programmed by software to 2, 6 or 10 mA. Several outputs

can be connected together to get higher drive capabilities.

P3.3

P3.5

P3.6

P3.7

Table 3-6. TWI Signal Description

Signal

Name

SCL

SDA

Type Description

SCL: TWI Serial Clock

I/O SCL output the serial clock to slave peripherals.

SCL input the serial clock from master.

I/O

SDA: TWI Serial Data

SCL is the bidirectional TWI data line.

Alternate

Function

P4.0

P4.1

Table 3-7. SPI Signal Description

Signal

Name Type Description

Alternate

Function

SS

I/O SS: SPI Slave Select

P1.1

MISO

MISO: SPI Master Input Slave Output line

I/O When SPI is in master mode, MISO receives data from the slave

peripheral. When SPI is in slave mode, MISO outputs data to the master

controller.

P1.5

SCK

SCK: SPI Serial Clock

I/O

SCK outputs clock to the slave peripheral or receive clock from the master

P1.6

MOSI

I/O MOSI: SPI Master Output Slave Input line

When SPI is in master mode, MOSI outputs data to the slave peripheral.

When SPI is in slave mode, MOSI receives data from the master controller

P1.7

8 AT89C5130A/31A-M

4337K–USB–04/08

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