NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 139

• 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

T
memory and a memory peripheral. Each block transfer is defined by a descriptor of
two words (memory-to-peripheral) or three words (memory-to-memory) in circular
buffers maintained by the CPU. As each block transfer completes, the CPU need
update only the descriptor for the completed block transfer, minimizing CPU
intervention.
DMA Module
C
he NS7520 supports 13 DMA channels. Each channel moves blocks of data between
H
A
P
T
E
R
8
w w w . d i g i e m b e d d e d . c o m
D M A M o d u l e
1 2 7