MSC7171 Datasheet, PDF (6/7 Pages) OKI electronic componets – 12-Bit Grid Driver

¡ Semiconductor
MSC7171
FUNCTIONAL DESCRIPTION
Function Table
Shift register
Input
CLOCK
DATA
X
L
H
PO1
L
H
Shift Register Parallel Out
PO2
...
PO11
No Change
PO1n
...
PO10n
PO1n
...
PO10n
X: Don't Care
PO1n to PO11n: Data of PO1 to PO11 just before the CLOCK rises
PO12
PO11n
PO11n
Driver output
Input
STANDBY
H
L
L
L
X: Don't Care
m: 1 to 12
DUTY
X
L
H
Shift Register
Parallel Out
POm
X
X
L
H
Driver Output
DRIDm
L
L
L
H
Operating Mode
Low Current Mode
Normal Mode
Normal Mode
Normal Mode
NOTES ON USE
The contents of the shift register are undefined after power is turned on. Because of this,
immediately after power is turned on, some drivers may go "H" to cause the VF display to flicker.
To avoid this, first turn on the logic power while holding the STANDBY pin at "H", then turn on
the driver power.
After this, set the STANDBY pin to "L" and input data from the DATA pin, then set the DUTY
pin to "H" to start for display.
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