MAX186 Evaluation System/Evaluation Kit

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Software Architecture

Software for EV kits using the Maxim 80C32 module is

divided into three elements: the interface program run-

ning on an IBM-compatible PC, a module program

located in EPROM, and a program supplied on disk

that is transferred to the RAM located on the module.

EPROM Resident Program

The EPROM resident program initializes the 80C32,

establishes communications over the RS-232 link, ver-

ifies the static RAM, and downloads other programs.

Its operation starts on power-up and whenever the

reset button is pressed. After reset, the program waits

indefinitely to receive a character over the RS-232

port. When the first character is received, a logon

banner identifying the module and firmware revision is

transmitted.

Immediately following transmission of the logon banner,

the program runs a checker routine for the on-board

256kbit static RAM. The RAM is filled with several pat-

terns and then read to verify that each pattern has been

retained. A pass or fail indication is displayed on the

personal computer after each pass. EV kit software

requires proper operation of the RAM. Do not attempt

to use the board if any of the RAM checks fail.

Two other programs for the EV kits are provided on a

floppy disk shipped with each kit. One program acts as

the user interface and transmits commands to the

80C32 module. The other is an 80C32 application pro-

gram that executes from the RAM located on the mod-

ule. The procedure for loading the programs varies with

each kit, so follow the instructions provided.