NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 291

• 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

SDRAM burst read
SDRAM read, CAS latency = 2
Notes:
1
2
3
4
5
TEA*/LAST* (Note-5)
Non-muxed address
BE*[3:0]* (DQM)
CAS0* (A10/AP)
Muxed address
Port size determines which byte enable signals are active:
–
–
–
The precharge and/or active commands are not always present. These
commands depend on the address of the previous SDRAM access.
If CAS latency = 3, 5 NOPs occur between the read and burst terminate
commands.
If CAS latency = 3, 3 inhibits occur after burst terminate.
The TA* and TEA*/LAST signals are for reference only.
PortA2/AMUX
CAS3* (RAS)
CAS2* (CAS)
TA* (Note-5)
CAS1* (WE)
read D[31:0]
CS[4:0]*
8-bit port = BE3*
16-bit port = BE[3:2]
32-bit port = BE[3:0]
BCLK
RW*
prechg
6
35
36
27
34
34
12
T1
active
34
34
A10
37
35
34
34
34
read
37
34
34
nop
30
w w w . d i g i e m b e d d e d . c o m
nop
T2
10
nop
11
T2
nop
T2
E l e c t r i c a l C h a r a c t e r i s t i c s
31
34
bterm
T2
30
31
36
27
34
inhibit
inhibit
T1
2 7 9