NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 48

• 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

SDRAM burst read
SDRAM read, CAS latency = 1
Notes:
1
2
3
4
5
4 4
S D R A M t i m i n g
TEA*/LAST* (Note-5)
Non-muxed address
CAS0* (A10/AP)
BE[3:0]* (DQM)
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*
6
35
36
27
34
34
12
prechg
T1
N S 9 3 6 0 D a t a s h e e t
34
34
active
A10
37
35
34
34
34
read
37
34
34
30
nop
T2
10
11
0 3 / 2 0 0 6
nop
T2
nop
T2
31
34
bterm
T2
30
31
36
27
34
inhibit
T1