AT91SAM9G25-CU(2013) Просмотр технического описания (PDF) - Atmel Corporation

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Компоненты Описание

производитель

AT91SAM9G25-CU
(Rev.:2013)

AT91SAM ARM-based Embbedded MPU

Atmel Corporation 

Table 3-1. Signal Description List (Continued)

Signal Name

Function

Type

External Bus Interface - EBI

D0-D15

Data Bus

I/O

D16-D31

Data Bus

I/O

A0-A25

Address Bus

Output

NWAIT

External Wait Signal

Input

Static Memory Controller - SMC

NCS0-NCS5

Chip Select Lines

Output

NWR0-NWR3

Write Signal

Output

NRD

Read Signal

Output

NWE

Write Enable

Output

NBS0-NBS3

Byte Mask Signal

Output

NAND Flash Support

NFD0-NFD16

NAND Flash I/O

I/O

NANDCS

NAND Flash Chip Select

Output

NANDOE

NAND Flash Output Enable

Output

NANDWE

NAND Flash Write Enable

Output

DDR2/SDRAM/LPDDR Controller

SDCK,#SDCK

DDR2/SDRAM Differential Clock

Output

SDCKE

DDR2/SDRAM Clock Enable

Output

SDCS

DDR2/SDRAM Controller Chip Select

Output

BA[0..2]

Bank Select

Output

SDWE

DDR2/SDRAM Write Enable

Output

RAS-CAS

Row and Column Signal

Output

SDA10

SDRAM Address 10 Line

Output

DQS[0..1]

Data Strobe

I/O

DQM[0..3]

Write Data Mask

Output

High Speed MultiMedia Card Interface - HSMCI0-1

MCI0_CK, MCI1_CK

Multimedia Card Clock

I/O

MCI0_CDA, MCI1_CDA

Multimedia Card Slot Command

I/O

MCI0_DA0-MCI0_DA3

Multimedia Card 0 Slot A Data

I/O

MCI1_DA0-MCI1_DA3

Multimedia Card 1 Slot A Data

I/O

Universal Synchronous Asynchronous Receiver Transmitter - USARTx

SCKx

USARTx Serial Clock

I/O

TXDx

USARTx Transmit Data

Output

RXDx

USARTx Receive Data

Input

RTSx

USARTx Request To Send

Output

CTSx

USARTx Clear To Send

Input

Active Level

Low

Low

Low

Low

Low

Low

Low

Low

Low

High

Low

Low

Low

Low

SAM9G25 [DATASHEET]

6

11032C–ATARM–25-Jan-13

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