AT91SAM9G20 datasheet(7/832 Pages) ATMEL

7 / 832 page

6384D–ATARM–04-May-09

AT91SAM9G20 Preliminary

NAND Flash Support

NANDCS

NAND Flash Chip Select

Output

Low

NANDOE

NAND Flash Output Enable

Output

Low

NANDWE

NAND Flash Write Enable

Output

Low

NANDALE

NAND Flash Address Latch Enable

Output

Low

NANDCLE

NAND Flash Command Latch Enable

Output

Low

SDRAM Controller

SDCK

SDRAM Clock

Output

SDCKE

SDRAM Clock Enable

Output

High

SDCS

SDRAM Controller Chip Select

Output

Low

BA0 - BA1

Bank Select

Output

SDWE

SDRAM Write Enable

Output

Low

RAS - CAS

Row and Column Signal

Output

Low

SDA10

SDRAM Address 10 Line

Output

Multimedia Card Interface MCI

MCCK

Multimedia Card Clock

Output

MCCDA

Multimedia Card Slot A Command

I/O

MCDA0 - MCDA3

Multimedia Card Slot A Data

I/O

MCCDB

Multimedia Card Slot B Command

I/O

MCDB0 - MCDB3

Multimedia Card Slot B Data

I/O

Universal Synchronous Asynchronous Receiver Transmitter USARTx

SCKx

USARTx Serial Clock

I/O

TXDx

USARTx Transmit Data

I/O

RXDx

USARTx Receive Data

Input

RTSx

USARTx Request To Send

Output

CTSx

USARTx Clear To Send

Input

DTR0

USART0 Data Terminal Ready

Output

DSR0

USART0 Data Set Ready

Input

DCD0

USART0 Data Carrier Detect

Input

RI0

USART0 Ring Indicator

Input

Synchronous Serial Controller - SSC

SSC Transmit Data

Output

SSC Receive Data

Input

SSC Transmit Clock

I/O

SSC Receive Clock

I/O

SSC Transmit Frame Sync

I/O

SSC Receive Frame Sync

I/O

Table 3-1.

Signal Description List (Continued)

Signal Name

Function

Type

Active

Level

Comments

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