AT91SAM7A1 Datasheet, PDF (6/14 Pages) ATMEL Corporation – ARM7TDMI BASED MICROCONTROLLER

PRELIMINARY
Table 2. Pin Description
Module
Name
T0TIOA[2:0]/MPIO
Timer T0 T0TIOB[2:0]/MPIO
T0TCLK[2:0]/MPIO
ADC
ANAIN[7:0]
VREFP
SPCK/MPIO
MISO/MPIO
SPI
MOSI/MPIO
NPCS[3:1]/MPIO
NPCS0/MPIO
CAN0
CANRX0
CANTX0
SCANEN
Function
Capture/waveform I/O
Trigger/waveform I/O
External clock/trigger/input
Analog input
Positive voltage reference
SPI clock line
SPI master in slave out
SPI master out slave in
SPI chip select
SPI chip select
CAN0 receive line
CAN0 transmit line
Scan enable (Factory test)
JTAG
TDI
TDO
TMS
TCK
TEST
Test Data In
Test Data Out
Test Mode Select
Test Clock
Factory test
Power
Supplies
VDDCORE
VDDANA
VDDIO
GND
Core Power Supply
Analog Power Supply
I/O Lines Power Supply
Ground
Type⁽¹⁾
I/O (I)
I/O (I)
I/O (I)
I
I
I/O (I)
I/O (I)
I/O (I)
I/O (I)
I/O (I)
I
O
I
I
O
I
I
I
–
–
–
–
Level⁽¹⁾
(Z)
(Z)
(Z)
(Z)
(Z)
(Z)
(Z)
(Z)
L
L (H)
H
H
Comments
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Multiplexed with a general-purpose I/O
Internal pull-down (must be connected
to GND or leave unconnected for
normal operation)
Schmitt trigger, internal pull-up
Schmitt trigger, internal pull-up
Schmitt trigger, internal pull-up
Internal pull-down (must be connected
to GND or leave unconnected for
normal operation)
3.3V
3.3V
3.3V to 5V
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.
6 _{AT91SAM7A1 Summary}
6048AS–ATARM–07/04