AN2282

Hardware

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1

Hardware

The target microcontroller for the solution is the STR710 with TQFP144 package to have the

EMI bus available for Ethernet controller interfacing. The hardware includes also a RS232

interface for SLIP implementation.

1.1

The STR710 microcontroller

The STR710 is a 16-/32-bit microcontroller based on the ARM7TDMI RISC microprocessor.

It combines the high performance of the ARM® CPU with an extensive range of peripheral

functions and enhanced I/O capabilities. The microcontroller has on-chip high-speed single

voltage FLASH memory and high-speed RAM, since both memories are mounted on an

ARM® CPU native bus the STR710 maximizes the CPU calculation speed. The STR710

has an embedded ARM® core and is therefore compatible with all ARM tools and software.

The 144-pin version (used for the solution in the present AN) has a non-multiplexed 16-bit

data/24-bit address bus available that supports four 16-Mbyte banks of external memory

(EMI). Wait states are programmable individually for each bank allowing different memory

types (Flash, EPROM, ROM, SRAM etc.) to be used to store programs or data. Later on, the

way of interfacing the EMI with an ISA Ethernet controller will be shown.