AT91SAM9G10_1 Datasheet, PDF (136/730 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

21.2 Block Diagram
Figure 21-1 shows the organization of the External Bus Interface.
Figure 21-1. Organization of the External Bus Interface
Bus Matrix
External Bus Interface
AHB
SDRAM
Controller
Static
Memory
Controller
MUX
Logic
NAND Flash
Logic
CompactFlash
Logic
PIO
Address Decoders
Chip Select
Assignor
User Interface
D[15:0]
A0/NBS0
A1/NWR2/NBS2
A[15:2], A[21:18]
A22/REG
A16/BA0
A17/BA1
NCS0
NCS1/SDCS
NCS2
NCS3/NANDCS
NRD/CFOE
NWR0/NWE/CFWE
NWR1/NBS1/CFIOR
NWR3/NBS3/CFIOW
SDCK
SDCKE
RAS
CAS
SDWE
SDA10
D[31:16]
A[24:23]
A25/CFRNW
NCS4/CFCS0
NCS5/CFCS1
NCS6/NANDOE
NCS7/NANDWE
CFCE1
CFCE2
NWAIT
APB
136 AT91SAM9G10
6462A–ATARM–03-Jun-09