Appendix A - Configuration Links and SRAM Bank 1
6-2
AT91EB01 Evaluation Board User Manual
Note:
Use a 10K resistor
6.3
Increasing
Memory Size
The AT91EB01 is supplied with four 128K x 8 byte SRAM memories. If, however, the
user needs more than 512K bytes of memory, the devices can be replaced with four
512K x 8 3.3V 15/20 ns SRAMs giving in total 2048K bytes. If this is done, LK1 must be
moved to position B-C.
The user must either have 128K x 8 SRAMs or 512K x 8 SRAMs fitted in Bank 0 and, if
desired, Bank 1. The two SRAM sizes cannot be mixed.
LK4
Function
A-C
RXD lines are set tri-state on the RS-232 transceiver so that the receiver
signals to AT91 can be used for external I/O via the I/O connector
B-C
Receive pins on AT91 used by on board serial ports
LK5
Function
A-C
TXD0 connects to I/O connector
B-C
TXD0 connects to RS-232 Transceiver
LK6
Function
A-C
AT91 IRQ0 pin connects to I/O connector
B-C
AT91 IRQ0 input is from IRQ switch
LK7
Function
A-C
AT91 FIQ pin connects to I/O connector
B-C
AT91 FIQ input is from FIQ switch
LK8
Function
A-C
TXD1 connects to I/O connector
B-C
TXD1 connects to RS-232 Transceiver
LK9
Function
A-C
TIOB1 connects to I/O connector
B-C
AT91 TIOB1 input is from TIOB1 switch
Summary of Contents for AT91EB01
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