NS7520B-1-C36 Digi International, NS7520B-1-C36 Datasheet - Page 3

• 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

Contents
NS7520 Overview........................................................................... 1
Key Features................................................................................ 2
Operating frequency ...................................................................... 3
Packaging and pinout ..................................................................... 4
Pinout detail tables ....................................................................... 6
NS7520 modules........................................................................... 18
NS7520 bootstrap initialization ......................................................... 22
DC characteristics and other operating specifications.............................. 23
AC characteristics ........................................................................ 25
Oscillator Characteristics................................................................ 27
Timing Diagrams .......................................................................... 28
System Bus interface............................................................. 6
Chip select controller........................................................... 10
Ethernet interface MAC......................................................... 11
“No connect” pins ............................................................... 13
General Purpose I/O ............................................................ 13
System clock and reset ......................................................... 15
System mode (test support) ................................................... 16
JTAG test ......................................................................... 16
Power supply ..................................................................... 17
CPU module ...................................................................... 18
GEN module ...................................................................... 18
System (SYS) module............................................................ 18
BBus module...................................................................... 19
Memory module (MEM).......................................................... 19
DMA controller ................................................................... 19
Ethernet controller.............................................................. 19
Serial controller ................................................................. 21
JTAG ............................................................................... 22
ARM Debug........................................................................ 22
Absolute maximum ratings..................................................... 24
Pad pullup and pulldown characteristics .................................... 24
AC electrical specifications .................................................... 25
Timing_Specifications........................................................... 28
Reset_timing ..................................................................... 29
SRAM timing ...................................................................... 30
SDRAM timing .................................................................... 40
FP DRAM timing .................................................................. 48
Ethernet timing .................................................................. 55
JTAG timing ...................................................................... 57
External DMA timing ............................................................ 59
Serial internal/external timing................................................ 61
GPIO timing....................................................................... 63
i i i