AT91M40400-25C ATMEL Corporation, AT91M40400-25C Datasheet - Page 3

• Manufacturer Part Number: AT91M40400-25C
• Description: 16/32-bit Microcontroller, 2.7V to 3.6V Operating Range
• Manufacturer: ATMEL Corporation

Table 1. AT91M40400 Pin Description
Module
USART
Power
Reset
Timer
Clock
AIC
PIO
WD
ICE
EBI
Name
A0-A23
D0-D15
NCS0-NCS3
CS4-CS7
NWR0
NWR1
NRD
NWE
NOE
NUB
NLB
NWAIT
BMS
FIQ
IRQ0-IRQ2
TCLK0-TCLK2
TIOA0-TIOA2
TIOB0-TIOB2
SCK0-SCK1
TXD0-TXD1
RXD0-RXD1
P0-P31
NWDOVF
MCKI
MCKO
NRST
NTRI
TMS
TDI
TDO
TCK
VDD
GND
Function
Address Bus
Data Bus
Chip Select
Chip Select
Lower Byte 0 Write Signal
Upper Byte 1 Write Signal
Read Signal
Write Enable
Output Enable
Upper Byte Select
Lower Byte Select
Wait Input
Boot Mode Select
Fast Interrupt Request
External Interrupt Request
Timer External Clock
Multipurpose Timer I/O pin A
Multipurpose Timer I/O pin B
External Serial Clock
Transmit Data Output
Receive Data Input
Parallel IO line
Watchdog overflow
Master Clock Input
Master Clock Output
Hardware Reset Input
Tristate Mode Select
Test Mode Select
Test Data Input
Test Data Output
Test Clock
Power
Ground
Ground
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Power
Type
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
Active
Level
High
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Comments
All valid after reset
A23-A20 after reset
Used in Byte Write option
Used in Byte Write option
Used in Byte Write option
Used in Byte Select option
Used in Byte Select option
Used in Byte Select option
Used in Byte Select option
Sampled during reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
PIO-controlled after reset
See Table 8
Open-drain
Schmidt trigger
Schmidt trigger, internal pull-up
Sampled during reset
Schmidt trigger, internal pull-up
Schmidt trigger, internal pull-up
Schmidt trigger, internal pull-up
AT91M40400
3