NS7520B-1-C55 Digi International, NS7520B-1-C55 Datasheet - Page 63
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NS7520B-1-C55
Manufacturer Part Number
NS7520B-1-C55
Description
IC ARM MICROPROCESSOR 177BGA
Manufacturer
Digi International
Series
NET+ARM®r
Specifications of NS7520B-1-C55
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
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
IR
Quantity:
4 954
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-C55
Manufacturer:
NETARM
Quantity:
20 000
External DMA timing
BCLK max frequency: 55.296 MHz
Operating conditions:
External DMA timing parameters
Fly-by external DMA
Notes:
1
2
Temperature:
Voltage:
Output load:
Input drive:
72
75
70
71
73
74
Num
Mem signals (Note-1)
The memory signals are data[31:0], addr[27:0], BE[3:0], CS/RAS[4:0], CAS[3:0], RW, OE*. WE*,
and PORTC3/AMUX. The timing of these signals depends on how the memory is configured
(Sync SRAM, Async SRAM, FP DRAM, or SDRAM).
The DONE* signal works as an input only when the DMA channel is configured as fly-by write.
DONE* (output)
DONE* (input)
BCLK high to DACK* valid
BCLK high to DONE* (output) valid
DREQ* low to BCLK high (setup)
BCLK high to DREQ* valid (hold)
DONE* (input) valid BCLK high (setup)
BLCK high to DONE* (input) valid (hold)
Description
DACK*
DREQ*
BCLK
-15.00 (min)
1.60 (min)
25.0pf
CMOS buffer
Note2
72
75
110.00 (max)
1.40 (max)
T1
TW
5
0
5
0
70
Min
71
w w w . d i g i . c o m
14
15
Max
T2
73
74
ns
ns
ns
ns
ns
ns
Unit
72
75
E x t e r n a l D M A t i m i n g
5 9