AT91SAM9R64(2008) Просмотр технического описания (PDF) - Atmel Corporation

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Компоненты Описание

производитель

AT91SAM9R64
(Rev.:2008)

AT91 ARM Thumb Microcontrollers

Atmel Corporation 

Table 3-1. Signal Description List (Continued)

Signal Name

Function

Active

Type Level Comments

JTAGSEL

JTAG Selection

Input

Pull-down resistor

NTRST

Test Reset Signal

Input Low Pull-up resistor.

Reset/Test

NRST

Microcontroller Reset

I/O

Low Pull-up resistor

TST

Test Mode Select

Input

Pull-down resistor

BMS

Boot Mode Select

Input

Must be connected to GND or VDDIOP.

Debug Unit - DBGU

DRXD

Debug Receive Data

Input

DTXD

Debug Transmit Data

Output

Advanced Interrupt Controller - AIC

IRQ

External Interrupt Input

Input

FIQ

Fast Interrupt Input

Input

PIO Controller - PIOA - PIOB - PIOC-PIOD

PA0 - PA31

Parallel IO Controller A

I/O

Pulled-up input at reset

PB0 - PB31

Parallel IO Controller B

I/O

Pulled-up input at reset

PC0 - PC31

Parallel IO Controller C

I/O

Pulled-up input at reset

PD0 - PD21

Parallel IO Controller D

I/O

Pulled-up input at reset

External Bus Interface - EBI

D0 - D31

Data Bus

I/O

Pulled-up input at reset. D16-D31 not

present on AT91SAM9R64.

A0 - A25

Address Bus

Output

0 at reset

NWAIT

External Wait Signal

Input Low

Static Memory Controller - SMC

NCS0 - NCS5

Chip Select Lines

Output

Low

NCS2, NCS5 not present on

AT91SAM9R64.

NWR0 - NWR3

Write Signal

Output Low

NRD

Read Signal

Output Low

NWE

Write Enable

Output Low

NBS0 - NBS3

Byte Mask Signal

Output Low

CompactFlash Support

CFCE1 - CFCE2

CompactFlash Chip Enable

Output Low

CFOE

CompactFlash Output Enable

Output Low

CFWE

CompactFlash Write Enable

Output Low

CFIOR

CompactFlash IO Read

Output Low

CFIOW

CompactFlash IO Write

Output Low

CFRNW

CompactFlash Read Not Write

Output

8 AT91SAM9R64/RL64 Preliminary

6289A–ATARM–15-Jan-08

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