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AT91F40816_02 Datasheet, PDF (3/21 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers
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AT91F40816
Pin Description
Table 1. AT91F40816 Pin Description
Module
EBI
Name
A0 - A23
D0 - D15
NCS0 - NCS3
CS4 - CS7
NWR0
NWR1
NRD
NWE
NOE
NUB
NLB
NWAIT
Function
Address Bus
Data Bus
External Chip Select
External 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
AIC
Timer
USART
PIO
WD
Clock
Reset
ICE
BMS
Boot Mode Select
FIQ
Fast Interrupt Request
IRQ0 - IRQ2
External Interrupt Request
TCLK0 - TCLK2 Timer External Clock
TIOA0 - TIOA2 Multi-purpose Timer I/O Pin A
TIOB0 - TIOB2 Multi-purpose Timer I/O Pin B
SCK0 - SCK1 External Serial Clock
TXD0 - TXD1 Transmit Data Output
RXD0 - RXD1 Receive Data Input
P0 - P31
Parallel IO Line
NWDOVF
Watchdog Overflow
MCKI
Master Clock Input
MCKO
Master Clock Output
NRST
Hardware Reset Input
NTRI
Tri-state Mode Select
TMS
Test Mode Select
TDI
Test Data Input
TDO
Test Data Output
TCK
Test Clock
Type
Output
I/O
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
I/O
I/O
I/O
Output
Input
I/O
Output
Input
Output
Input
Input
Input
Input
Output
Input
Active
Level
–
–
Low
High
Low
Low
Low
Low
Low
Low
Low
Low
–
–
–
–
–
–
–
–
–
–
Low
–
–
Low
Low
–
–
–
–
Comments
Valid after reset; do not reprogram A20 to
I/O, as it is MSB of Flash address
Used to select external devices
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; must be driven low
during reset for Flash to be used as boot
memory
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
Open drain
Schmidt trigger
Schmidt trigger
Sampled during reset
Schmidt trigger, internal pull-up
Schmidt trigger, internal pull-up
Schmidt trigger, internal pull-up
3
1384C–ATARM–02/02
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