NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 16
![no-image](/images/manufacturer_photos/0/1/193/digi_international_sml.jpg)
NS7520B-1-I46
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-I46
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-I46
Manufacturer:
NETARM
Quantity:
20 000
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4
N S 7 5 2 0 F e a t u r e s
Programmable timers
–
–
–
Operating frequency
–
–
–
–
–
Bus interface
–
–
–
–
–
–
–
–
–
–
Two independent timers (2μs–20.7 hours)
Watchdog timer (interrupt or reset on expiration)
Programmable bus monitor or timer
36, 46, or 55 MHz internal clock operation from 18.432 MHz quartz crystal
or crystal oscillator
f
System clock source by external quartz crystal or crystal oscillator, or clock
signal
Programmable PLL, which allows a range of operating frequencies from 10
to f
Maximum operating frequency from external clock or using PLL
multiplication f
Five independent programmable chip selects with 256 Mb addressing per
chip select
All chip selects support SRAM, FP/EDO DRAM, SDRAM, flash, and EEPROM
without external glue
Supports 8-, 16-, and 32-bit peripherals
External address decoding and cycle termination
Dynamic bus sizing
Internal DRAM/SDRAM controller with address multiplexer and
programmable refresh frequency
Internal refresh controller (CAS before RAS)
Burst-mode support
0–63 wait states per chip select
Address pins that configure chip operating modes; see "NS7520 bootstrap
initialization" on page 59.
MAX
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
MAX
= 36, 46, or 55 MHz (grade-dependent)
MAX
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