NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 39

• 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

SRAM burst write
CS controlled, four word (4-2-2-2), burst write (wait = 2, BCYC = 01)
Notes:
1
2
3
4
TEA*/LAST (Note-4)
BE[3:0]* (Note-2)
If the next transfer is DMA, null periods between memory transfers can occur. 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]
Sync WE*
CS0WE*
CS[4:0]*
A[27:0]
8-bit port = BE3*
16-bit port = BE[3:0]
32-bit port = BE[3:0]
BCLK
RW*
6
36
12
T1
29
27
9
19
TW
TW
30
T2
30
TW
T2
TW
w w w . d i g i . c o m
T2
TW
31
T2
Note-1
31
36
27
13
19
29
T1
S R A M t i m i n g
3 5