¡ Semiconductor
MSM5238
FUNCTIONAL DESCRIPTION
Pin Functional Description
• DI
Shift register data input pin which inputs the data on scanning lines in synchronization with
aclock(positive logic). ThisLSIcanoptionallydividethe scanningsignal up to 1/32dutyLCD
panel because it consists of the 32-bit shift register.
• CP
Clock pulse input pin for the 32-bit shift register. The data is shifted to the 32-bit shift register
at the falling edge of the clock pulse. A data set up time (t ) and data hold time (t ) are
SETUP
HOLD
required between DIandCP. (RefertoSwitchingCharacteristics.)ASchmitt circuit is included
in the CP input circuit.
• DF
Synchronous signal input pin for alternate signal for LCD driving.
• V , V
DD SS
V
DD
is a power supply pin, which is normally from 3.0V to 7.0V. V is a ground pin, which
SS
is 0V.
• O - O
1
32
Display data output pins which correspond to each data bit in the latch. One of V , V , V and
1
2
3
V
(V ) is selected as a display driving voltage source based on the combination of latched
EE
4
data level and DF signal. Refer to the Truth Table. O - O are connected to the common side
1
32
of the LCD panel.
7/12
OKI [ OKI ELECTRONIC COMPONETS ]
