NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 285

• 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

SRAM OE read
OE* controlled read (wait = 2)
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)
read D[31:0]
TA* (input)
Async OE*
CS[4:0]*
CS0OE*
BE[3:0]*
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
27
TW
28
18
w w w . d i g i e m b e d d e d . c o m
30
31
T2
14
10
15
11
30
31
Note-1
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
28
18
36
27
T1
2 7 3