AT91SAM9G46 Datasheet, PDF(6/59 Page) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

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AT91SAM9G46 Datasheet, PDF (6/59 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

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Table 3-1. Signal Description List (Continued)

Signal Name

PC0 - PC31

Function

Parallel IO Controller C

Type

I/O

Active

Level

Reference

Voltage

(1)

PD0 - PD31

Parallel IO Controller D

I/O

(1)

PE0 - PE31

Parallel IO Controller E

I/O

(1)

DDR Memory Interface- DDR2/LPDDR Controller

DDR_D0 -

DDR_D15

Data Bus

I/O

VDDIOM0

DDR_A0 -

DDR_A13

Address Bus

Output

VDDIOM0

DDR_CLK-

#DDR_CLK

DDR differential clock input

Output

VDDIOM0

DDR_CKE

DDR Clock Enable

Output

High

VDDIOM0

DDR_CS

DDR Chip Select

Output

Low

VDDIOM0

DDR_WE

DDR Write Enable

Output

Low

VDDIOM0

DDR_RAS-

DDR_CAS

Row and Column Signal

Output

Low

VDDIOM0

DDR_DQM[0..1] Write Data Mask

Output

VDDIOM0

DDR_DQS[0..1] Data Strobe

Output

VDDIOM0

DDR_BA0 -

DDR_BA1

Bank Select

Output

VDDIOM0

DDR_VREF

Reference Voltage

Input

VDDIOM0

External Bus Interface - EBI

D0 -D31

Data Bus

I/O

VDDIOM1

A0 - A25

Address Bus

Output

VDDIOM1

NWAIT

External Wait Signal

Input

Low

VDDIOM1

EBI - Static Memory Controller - SMC

NCS0 - NCS5 Chip Select Lines

Output

Low

VDDIOM1

NWR0 - NWR3 Write Signal

Output

Low

VDDIOM1

NRD

Read Signal

Output

Low

VDDIOM1

NWE

Write Enable

Output

Low

VDDIOM1

NBS0 - NBS3

Byte Mask Signal

Output

Low

VDDIOM1

EBI - CompactFlash Support

CFCE1 - CFCE2 CompactFlash Chip Enable

Output

Low

VDDIOM1

CFOE

CompactFlash Output Enable

Output

Low

VDDIOM1

CFWE

CompactFlash Write Enable

Output

Low

VDDIOM1

CFIOR

CompactFlash IO Read

Output

Low

VDDIOM1

Comments

Pulled-up input at reset

0 at reset

Pulled-up input at reset

0 at reset

6 AT91SAM9G46

11028BSâATARMâ26-Apr-10

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