NS7520B-1-I46 Digi International, NS7520B-1-I46 Datasheet - Page 233

• 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

Serial port performance
Configuration
The serial ports have a finite performance limit on their ability to handle various
serial protocols. Performance is limited by the speed of the SYSCLK operating the
NS7520. The configured speed for the internal PLL defines the SYSCLK rate, as shown
in this table:
The serial controller module has a block of configuration space as shown:
UART (x16)
UART (x1)
SPI
FFD0 0000
FFD0 0004
FFD0 0008
FFD0 000C
FFD0 0010
FFD0 0014
FFD0 0018
FFD0 001C
FFD0 0020
FFD0 0040
FFD0 0044
FFD0 0048
Operating Mode
Address
Channel 1 Control Register A
Channel 1 Control Register B
Channel 1 Status Register A
Channel 1 Bit-Rate register
Channel 1 FIFO Data register
Channel 1 Receive Buffer Gap Timer
Channel 1 Receive Character Gap Timer
Channel 1 Receive Match register
Channel 1 Receive Match Mask register
Channel 2 Control Register A
Channel 2 Control Register B
Channel 2 Status Register A
Register
SYSCLK/64
SYSCLK/4
SYSCLK/6
Serial Port Maximum Rate
w w w . d i g i e m b e d d e d . c o m
S e r i a l C o n t r o l l e r M o d u l e
2 2 1