NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 42

• 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 WE write
WE* controlled write (wait = 2)
Notes:
1
2
3
4
3 8
TEA*/LAST (note-4)
S R A M t i m i n g
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*
TA* (input)
CS0WE*
BE[3:0]*
CS[4:0]*
A[27:0]
8-bit port = BE3*
16-bit port = BE[3:0]
32-bit port = BE[3:0]
BCLK
RW*
Note-2
6
36
12
T1
N S 7 5 2 0 D a t a s h e e t
27
9
TW
29
19
30
31
T2
14
0 3 / 2 0 0 6
15
30
31
Note-1
29
19
36
27
13
T1