UUT/DIO Interface Signals

Signal

I/O Dir.

DIO Module

Pin & Mnemonic

Comments

BusAv

In

Timing

J1-26

EXTrig

Generated by the LBC, triggers the DIO into RUN mode.

Stop

In

I/O Control

J9-10

Terminates the program. Issued byM VBC

 the system

Wvfm

In

Timing

J1-3

Ext2

Selects the waveform: DC or triangular

BusReq

Out

I/O Data

J4-9

DIO is ready to output the next DAC value.

Clk

Out

I/O Data

J4-10

DAC clock

D0 – D7

Out

I/O Data

J4-1 – J4-8

8 bit data to the DAC

MC

Out

I/O Data

J4-10

Master Clear for the DAC and Bus Controller.

OutEn

Out

I/O Control

J9-11

Signals the state of channels 0-7. Low = Enable, High = Tri-State, high Z.