Digi NS7520B-1-C36 Hardware Reference Manual page 7

System Control register ......................................................... 63
System Status register .......................................................... 68
Software Service register....................................................... 69
Timer Control registers ......................................................... 70
Timer Status registers........................................................... 73
PORTA Configuration register.................................................. 73
PORTC Configuration register.................................................. 77
Interrupts ................................................................................ 80
Interrupt controller registers .................................................. 81
C h a p t e r 7 : M e m o r y C o n t r o l l e r M o d u l e
About the MEM module ................................................................ 86
MEM module hardware initialization................................................. 86
Pin configuration................................................................. 86
MEM module configuration ............................................................ 87
Setting the chip select address range ........................................ 88
Memory Module Configuration register ....................................... 89
Chip Select Base Address register ............................................. 92
Chip Select Option Register A ................................................. 97
Chip Select Option Register B.................................................101
Static memory (SRAM) controller ...................................................102
Single cycle read/write ........................................................102
Burst cycles ......................................................................104
NS7520 DRAM address multiplexing .................................................105
Using the internal multiplexer................................................105
Using the external multiplexer ...............................................108
DRAM refresh ...........................................................................109
FP/EDO DRAM controller .............................................................109
Single cycle read/write ........................................................110
FP/EDO DRAM burst cycles ....................................................111
SDRAM ...................................................................................111
NS7520 SDRAM interconnect ..................................................112
SDRAM A10/AP support ........................................................116
Command definitions...........................................................117
Memory timing fields - SDRAM ...............................................118
BSIZE configuration .............................................................118
SDRAM Mode register ...........................................................119
........................................................ 85
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