NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 24

• 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

The MAC module interfaces to an external physical layer (PHY) device using the MII standard
defined by IEEE 802.3u. The MAC interface includes the MII clock and data signals.
Figure 4 shows a high-level block diagram of the EFE module, which provides the FIFO handling
interface between the NS7520 BBus and the MAC modules.
Figure 4: EFE module block diagram
2 0
E t h e r n e t c o n t r o l l e r
BBus
MAC TX interface
Transmit
N S 7 5 2 0 D a t a s h e e t
FIFO
byte
local
512
MAC RX interface
filtering &
statistics
Receive
Local
FIFO
byte
RX
2K
0 3 / 2 0 0 6