N S 7 5 2 0 F e a t u r e s

NS7520 Features

The NS7520 can support most any networking scenario, and includes a 10/100 BaseT Ethernet MAC and two independent serial ports (each of which can run in UART or SPI mode).

The CPU is an ARM7TDMI (ARM7) 32-bit RISC processor core with a rich complement of support peripherals and memory controllers, including:

Glueless connection to different types of memory; for example, flash, SDRAM, EEPROM, and others.

Programmable timers

13-channel DMA controller External bus expansion module

16 general-purpose I/O (GPIO) pins

Key features and operating modes of the major NS7520 modules

CPU core

ARM7 32-bit RISC processor

32-bit internal bus

32-bit ARM mode and 16-bit Thumb mode

15 general-purpose 32-bit registers

32-bit program counter (PC) and status register

Five supervisor modes, one user mode

13-channel DMA controller

Two channels dedicated to Ethernet transmit and receive

Four channels dedicated to two serial modules’ transmit and receive

Four channels for external peripherals (only two channels — either 3 and 5 or 4 and 6 — can be configured at one time)

Three channels available for memory-to-memory transfers

Flexible buffer management

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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 . D 0 3 / 2 0 0 6

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Digi manual NS7520 Features, Key features and operating modes of the major NS7520 modules