Testing the Clock and Shift Register Circuits – 8X2 Mode
Continuing from the previous procedure:
•
Press the Manual Load Switch.
¾
The Stage 1 Pattern LED should illuminate, and all other pattern LEDs should
remain off.
•
Set the 8X2/16X1 Switch to
8X2
.
•
Set the Clock Enable Switch to
ON
.
¾
The pattern LEDs for stages 1 through 8 should repeatedly cycle, and the pattern
LEDs 9 through 16 should remain off.
•
Set Clock Enable to
OFF
.
¾
The pattern LED’s should freeze with only one illuminated LED.
•
Set the Stage 1 Pattern Switch to
OFF
or “
0
”.
•
Set the Stage 9 Pattern Switch to
ON
or “
1
”.
•
Press the Manual Load Switch.
¾
Pattern LED 9 should illuminate and all other pattern LEDs should be off.
•
Set Clock Enable to
ON
.
¾
The pattern LEDs for stages 9 through 16 should repeatedly cycle, and the pattern
LEDs 1 through 8 should remain off.
Testing the Invert B Function
Continuing from the previous procedure:
•
Set Clock Enable to
OFF
¾
The pattern LEDs should freeze with only one illuminated LED.
•
Press the Manual Load Switch.
¾
Stage 9 Pattern LED should illuminate, with all others off.
•
Set Invert B to
ON
.
•
Set Clock Enable to
ON
.
¾
Stages 9 through 16 should now alternately light up as all on or all off as they
sequentially illuminate.
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