Rainbow Electronics AT91CAP9S250A - Manual (Page 170)

170
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
22.4 Application Example
22.4.1 Hardware Interface
Figure 22-1. SMC Connections to Static Memory Devices
22.5 Product Dependencies
22.5.1 I/O Lines
The pins used for interfacing the Static Memory Controller may be multiplexed with the PIO
lines. The programmer must first program the PIO controller to assign the Static Memory Con-
troller pins to their peripheral function. If I/O Lines of the SMC are not used by the application,
they can be used for other putposes by the PIO Controller.
Static Memory
Controller
D0-D31
A2 - A25
A0/NBS0
NWR0/NWE
NWR1/NBS1
A1/NWR2/NBS2
NWR3/NBS3
128K x 8
SRAM
D0 - D7
A0 - A16
OE
WE
CS
D0 - D7 D8-D15
A2 - A18
128K x 8
SRAM
D0-D7
CS
D16 - D23 D24-D31
128K x 8
SRAM
D0-D7
CS
NWR1/NBS1
NWR3/NBS3
NRD
NWR0/NWE
128K x 8
SRAM
D0 - D7
OE
WE
CS
NRD
A1/NWR2/NBS2
NCS0
NCS1
NCS2
NCS3
NCS4
NCS5
NCS6
NCS7
A2 - A18
A0 - A16
NRD
OE
WE
OE
WE
NRD
A2 - A18
A0 - A16
A2 - A18
A0 - A16