PT6302_10 Datasheet, PDF (15/27 Pages) Princeton Technology Corp – VFD Driver/Controller IC with Character RAM

PT6302
DISPLAY LIGHT SET COMMAND
The Display Light Set Command is used to turn all display lights ON or OFF. All Display Lights ON Mode is primarily
used for testing the display. The All Display Light OFF Mode is used for the blinking display and to prevent any
malfunction when the power is turned ON. The general output port cannot be controlled by this command. The command
format is given below.
LSB
MSB
1st Byte
B0 B1
B2
B3
B4 B5
B6 B7 _{The Display Light Set Command is selected.}
L
H
*
*
1
1
1
0
where:
1. L=All display lights are turned off
2. H=All display lights are turned on
3. *=Not relevant
The table below shows the SG and AD Display Status in relation to the Display Light Set Command data.
L H SG and AD Display State
0 0 Normal Display Mode
1 0 All Outputs ="LOW"
The state when the power is applied or when the RSTB
signal is inputted
0 1 All Outputs ="HIGH"
1 1 All Outputs = "HIGH"
All Display Light ON Mode has the first priority.
RECOMMENDED SOFTWARE FLOWCHART
Notes:
1. Display light active mode (ex. 0111XX00B)
2. Test mode off (ex. 1000X000B)
V2.1
15
August 2010