NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 8

• Manufacturer Part Number: NS7520B-1-C36
• Description: IC ARM MICROPROCESSOR 177BGA
• Manufacturer: Digi International
• Series: NET+ARM®r

Specifications of NS7520B-1-C36

• 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

viii
C h a p t e r 8 : D M A M o d u l e
C h a p t e r 9 : E t h e r n e t M o d u l e
Peripheral page burst size ...........................................................124
DMA module ............................................................................128
DMA buffer descriptor ................................................................130
DMA channel assignments ............................................................132
DMA channel registers ................................................................133
Ethernet transfer considerations....................................................144
Ethernet transmitter considerations................................................145
Ethernet receiver considerations ...................................................145
External peripheral DMA support....................................................146
DMA controller reset ..................................................................148
Ethernet front-end (EFE) .............................................................150
External CAM filtering ................................................................153
MAC module ............................................................................154
DMA channel assignments ............................................................156
EFE configuration ......................................................................156
SDRAM read cycles..............................................................120
SDRAM write cycles .............................................................122
Fly-by operation transfers.....................................................128
Memory-to-memory operation ................................................129
Address map .....................................................................133
Buffer Descriptor Pointer register ...........................................136
DMA Control register ...........................................................136
DMA Status/Interrupt Enable register .......................................142
Signal description ...............................................................147
External DMA configuration ...................................................147
Memory-to-memory mode .....................................................147
Transmit and receive FIFOs ...................................................151
EFE transmit processing .......................................................151
EFE receive processing.........................................................151
Receive buffer descriptor selection .........................................152
MAC module block diagram ...................................................154
Ethernet General Control register (EGCR) bit definitions ................158
...............................................................................................127
....................................................................................149