PT6332 Datasheet, PDF (18/37 Pages) Princeton Technology Corp – VFD Driver/Controller IC

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VFD Driver/Controller IC
PT6332
Note:
*: These diodes are required to reliably recognize multiple key presses on the KS5 line when the IC is
set to sleep mode with only KS5 set to high as in the example above. That is, they prevent incorrect
recognition of key pressed due to sneak currents arising from simultaneous presses of keys on the
KS1 through KS4 lines.
Key Input
(KS6 line)
Key scan
61 5T[s]
61 5T[s]
CE
Se rial da ta tran sfer Se rial da ta tran sfer Ke y ad dre ss (43 H) Se rial da ta tran sfer
DI
Ke y ad dre ss
DO
Ke y da ta r ead re que st
Ke y da ta r ead
Ke y da ta r ead
Ke y da ta r ead re que st
T=
1
fosc
PT6332 V1.0
- 18 -
February, 2006