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AT91SAM9G45-CU

AT91SAM ARM-based Embedded MPU

Atmel Corporation 

Table 3-1. Signal Description List (Continued)

Signal Name

Function

Type

Active Reference

Level

Voltage Comments

PD0 - PD31

Parallel IO Controller D

I/O

(1)

Pulled-up input at reset

(100kΩ)(3), Schmitt trigger

PE0 - PE31

Parallel IO Controller E

I/O

(1)

Pulled-up input at reset

(100kΩ)(3), Schmitt trigger

DDR Memory Interface- DDR2/SDRAM/LPDDR Controller

DDR_D0 -

DDR_D15

Data Bus

I/O

VDDIOM0 Pulled-up input at reset

DDR_A0 -

DDR_A13

Address Bus

Output

VDDIOM0 0 at reset

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 Pulled-up input at reset

A0 - A25

Address Bus

Output

VDDIOM1 0 at reset

NWAIT

External Wait Signal

Input

Low

VDDIOM1

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

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

CFIOW

CompactFlash IO Write

Output

Low

VDDIOM1

CFRNW

CompactFlash Read Not Write

Output

VDDIOM1

CFCS0 -CFCS1 CompactFlash Chip Select Lines

Output

Low

VDDIOM1

SAM9G45 [DATASHEET]

6

6438K–ATARM–12-Feb-13

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