Atmel AT85DVK-07 Especificaciones descargar pdf (Pagina 12)

AT85C51SND3Bx

7632A–MP3–03/06

Parallel Slave Interface Table 10. PSI Signal Description

Serial Interfaces Table 11. SPI Controller Signal Description

Table 12. SIO Signal Description

AVDD2 PWR

Analog Power Supply 2

Low Voltage system: connect this pin to LVDD pin.

High voltage system: connect this pin to external +3V power supply.

AVSS2 GND

Analog Ground 2

Low Voltage system: connect this pin to LVSS pin.

High voltage system: connect this pin to external +3V ground.

Signal

Name Type Description

Alternate

Function

Signal

Name

Type Description

Alternate

Function

SD7:0 I/O

Slave Data Bus

8-bit bidirectional data bus.

P0.7:0

LD7:0

SRD I

Slave Read Signal

Read signal asserted low during external host read operation.

P5.0

LRD/LDE

SWR I

Slave Write Signal

Write signal asserted low during external host write operation.

P5.3

LWR/LRW

SCS I

Slave Chip Select

Select signal asserted low during external host read or write operation.

P5.1

LCS

SA0 I

Slave Address Bit 0

Address signal asserted during external host read or write operation.

P5.2

LA0/LRS

Signal

Name

Type Description

Alternate

Function

MISO I/O

SPI Master Input Slave Output Data Line

When in master mode, MISO receives data from the slave peripheral.

When in slave mode, MISO outputs data to the master controller.

P3.0

RXD

MOSI I/O

SPI Master Output Slave Input Data Line

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

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

P3.1

TXD

SCK I/O

SPI Clock Line

When in master mode, SCK outputs clock to the slave peripheral.

When in slave mode, SCK receives clock from the master controller.

P3.2

INT0

RTS

SS I

SPI Slave Select Line

When in controlled slave mode, SS enables the slave mode.

P3.3

INT1

CTS

Signal

Name

Type Description

Alternate

Function

RXD I/O

Receive Serial Data

RXD sends and receives data in serial I/O mode 0 and receives data in

serial I/O modes 1, 2 and 3.

P3.0

MISO

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 262 263

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