NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 7

• Manufacturer Part Number: NS7520B-1-I46
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-I46

• Applications: Network Processor
• Core Processor: ARM7
• Program Memory Type: External Program Memory
• Controller Series: -
• Ram Size: External
• Interface: EBI/EMI, Ethernet, DMA, SPI, UART
• Number Of I /o: 16
• Voltage - Supply: 1.4 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 177-LFBGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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
Interrupts ................................................................................ 80
About the MEM module ................................................................ 86
MEM module hardware initialization................................................. 86
MEM module configuration ............................................................ 87
Static memory (SRAM) controller ...................................................102
NS7520 DRAM address multiplexing .................................................105
DRAM refresh ...........................................................................109
FP/EDO DRAM controller .............................................................109
SDRAM ...................................................................................111
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
Interrupt controller registers .................................................. 81
Pin configuration................................................................. 86
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
Single cycle read/write ........................................................102
Burst cycles ......................................................................104
Using the internal multiplexer................................................105
Using the external multiplexer ...............................................108
Single cycle read/write ........................................................110
FP/EDO DRAM burst cycles ....................................................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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