6

PRELIMINARY

AT91SAM7A1 Summary

6048AS–ATARM–07/04

Notes:

1. Values in brackets are values at reset H (high level), L (low level), Z (tri-state), I (input), O (output).

2. The EBI bus (address bus A[21:0], data bus D[15:0] and control lines NOE/NRD, NWR0/NWE, NWR1/NUB and NCS[3:0]) is

tri-stated when NRESET is at a logical 0. This allows external equipment to access the external memory devices (e.g., for

Flash programming). It is up to the application to add an external pull-up on the chip select lines in order to avoid EBI con-

flicts at reset.

3. The EBI data bus D[15:0] has an internal pull-down.

Timer T0

T0TIOA[2:0]/MPIO

Capture/waveform I/O

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

T0TIOB[2:0]/MPIO

Trigger/waveform I/O

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

T0TCLK[2:0]/MPIO

External clock/trigger/input

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

ADC

ANAIN[7:0]

Analog input

I

VREFP

Positive voltage reference

I

SPI

SPCK/MPIO

SPI clock line

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

MISO/MPIO

SPI master in slave out

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

MOSI/MPIO

SPI master out slave in

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

NPCS[3:1]/MPIO

SPI chip select

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

NPCS0/MPIO

SPI chip select

I/O (I)

(Z)

Multiplexed with a general-purpose I/O

CAN0

CANRX0

CAN0 receive line

I

L

CANTX0

CAN0 transmit line

O

L (H)

JTAG

SCANEN

Scan enable (Factory test)

I

H

Internal pull-down (must be connected

to GND or leave unconnected for

normal operation)

TDI

Test Data In

I

Schmitt trigger, internal pull-up

TDO

Test Data Out

O

TMS

Test Mode Select

I

Schmitt trigger, internal pull-up

TCK

Test Clock

I

Schmitt trigger, internal pull-up

TEST

Factory test

I

H

Internal pull-down (must be connected

to GND or leave unconnected for

normal operation)

Power

Supplies

VDDCORE

Core Power Supply

–

3.3V

VDDANA

Analog Power Supply

–

3.3V

VDDIO

I/O Lines Power Supply

–

3.3V to 5V

GND

Ground

–

Table 2. Pin Description

Module

Name

Function

Type

(1)

Level

(1)

Comments