NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 288
![no-image](/images/manufacturer_photos/0/1/193/digi_international_sml.jpg)
NS7520B-1-I46
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-I46
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-I46
Manufacturer:
NETARM
Quantity:
20 000
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2 7 6
T i m i n g D i a g r a m s
SRAM WE burst write
WE* controlled, four word (3-2-2-2), burst write (wait = 2, BCYC = 01)
Notes:
1
2
3
4
TEA*/LAST (Note-4)
At least one null period occurs between memory transfers. More null periods can
occur if the next transfer is DMA. Thirteen clock pulses are required for DMA
context switching.
Port size determines which byte enable signals are active:
–
–
–
The TW cycles are present when the WAIT field is set to 2 or more.
The TA* and TEA*/LAST signals are for reference only.
TA* (Note-4)
write D[31:0]
Async WE*
CS0WE*
CS[4:0]*
BE[3:0]*
8-bit port = BE3*
16-bit port = BE[3:0]
32-bit port = BE[3:0]
A[27:0]
BCLK
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
RW*
Note-2
6
36
12
T1
27
9
TW
29
19
30
T2
30
TW
29
19
T2
TW
T2
TW
31
T2
Note-1
31
36
27
13
T1
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