NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 63

• 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

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