AT91M40400-25C ATMEL Corporation, AT91M40400-25C Datasheet - Page 10

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

Pin Description
The following table shows how certain EBI signals are multiplexed:
Name
A0 - A23
D0 - D15
NCS0 - NCS3
CS4 - CS7
NRD
NWR0 - NWR1
NOE
NWE
NUB, NLB
NWAIT
Multiplexed Signals
A23 - A20
A0
NRD
NWR0
NWR1
10
CS4 - CS7
NLB
NOE
NWE
NUB
AT91M40400
Description
Address bus (output)
Data bus (input/output)
Active low chip selects (output)
Active high chip selects (output)
Read Enable (output)
Lower and upper write enable (output)
Output enable (output)
Write enable (output)
Upper and lower byte select (output)
Wait request (input)
Functions
Allows from 4 to 8 chip select lines to be used.
8- or 16-bit data bus
Byte-write or byte select access
Byte-write or byte select access
Byte-write or byte select access
Output
Output
Output
Output
Output
Output
Output
Output
Type
Input
I/O