NS7520B-1-C55 Digi International, NS7520B-1-C55 Datasheet - Page 47
![no-image](/images/manufacturer_photos/0/1/193/digi_international_sml.jpg)
NS7520B-1-C55
Manufacturer Part Number
NS7520B-1-C55
Description
IC ARM MICROPROCESSOR 177BGA
Manufacturer
Digi International
Series
NET+ARM®r
Specifications of NS7520B-1-C55
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
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
IR
Quantity:
4 954
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-C55
Manufacturer:
NETARM
Quantity:
20 000
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)
read D[31:0]
CAS1* (WE)
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
nop
T2
10
nop
11
T2
nop
T2
w w w . d i g i . c o m
31
34
bterm
T2
inhibit
30
31
36
27
34
inhibit
T1
S D R A M t i m i n g
4 3