AT91SAM7SE512 datasheet(7/47 Pages) ATMEL

7 / 47 page

6222ES–ATARM–15-Dec-09

AT91SAM7SE512/256/32 Preliminary Summary

Two-Wire Interface

TWD

Two-wire Serial Data

I/O

TWCK

Two-wire Serial Clock

I/O

Analog-to-Digital Converter

AD0-AD3

Analog Inputs

Analog

Digital pulled-up inputs at reset

AD4-AD7

Analog Inputs

Analog

Analog Inputs

ADTRG

ADC Trigger

Input

ADVREF

ADC Reference

Analog

Fast Flash Programming Interface

PGMEN0-PGMEN2

Programming Enabling

Input

PGMM0-PGMM3

Programming Mode

Input

PGMD0-PGMD15

Programming Data

I/O

PGMRDY

Programming Ready

Output

High

PGMNVALID

Data Direction

Output

Low

PGMNOE

Programming Read

Input

Low

PGMCK

Programming Clock

Input

PGMNCMD

Programming Command

Input

Low

External Bus Interface

D[31:0]

Data Bus

I/O

A[22:0]

Address Bus

Output

NWAIT

External Wait Signal

Input

Low

Static Memory Controller

NCS[7:0]

Chip Select Lines

Output

Low

NWR[1:0]

Write Signals

Output

Low

NRD

Read Signal

Output

Low

NWE

Write Enable

Output

Low

NUB

NUB: Upper Byte Select

Output

Low

NLB

NLB: Lower Byte Select

Output

Low

EBI for CompactFlash Support

CFCE[2:1]

CompactFlash Chip Enable

Output

Low

CFOE

CompactFlash Output Enable

Output

Low

CFWE

CompactFlash Write Enable

Output

Low

CFIOR

CompactFlash I/O Read Signal

Output

Low

CFIOW

CompactFlash I/O Write Signal

Output

Low

CFRNW

CompactFlash Read Not Write Signal

Output

CFCS[1:0]

CompactFlash Chip Select Lines

Output

Low

Table 3-1.

Signal Description List (Continued)

Signal Name

Function

Type

Active

Level

Comments

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