MSM6778 Datasheet, PDF (6/7 Pages) OKI electronic componets – 120-DOT COMMON DRIVER (TAB)

¡ Semiconductor
MSM6778
FUNCTIONAL DESCRIPTION
Pin Functional Description
• IO₁, IO₆₀, IO₆₁, IO₁₂₀
These are I/O pins of the two 60-bit bidirectional shift registers.
• SHL
This pin selects the shift direction of the two 60-bit bidirectional shift registers.
Set this pin to "H" or "L" level during power-on.
SHL Shift Direction
L
O_{1 Æ} O₆₀
O_{61 Æ} O₁₂₀
H
O_{60 Æ} O₁
O_{120 Æ} O₆₁
I/O pins
IO_1, IO₆₁
IO_60, IO₁₂₀
IO_60, IO₁₂₀
IO_1, IO₆₁
Function
Input IO₁ and IO₆₁ are data input pins for the shift
Output register. The entered data is read in at the falling
edge of a clock pulse. The data is output from
IO₆₀ and IO₁₂₀ behind the number of bits (60) of
the shift register.
Input IO₆₀ and IO₁₂₀ are data input pins for the shift
Output register. The entered data is read in at the falling
edge of a clock pulse. The data is output from IO₁
and IO₆₁ behind the number of bits (60) of the
shift register.
• CP
This is a clock pulse input for the two 60-bit bidirectional shift registers. Scan data is shifted at
the falling edge of a clock pulse.
• DF
This is a synchronous signal input for alternate signal for LCD driving.
• DISPOFF
This is an input used to control the output levels of O₁ to O₁₂₀. During low level input, the V₁
level is output from the output pins O₁ to O₁₂₀ independently of the data of the shift register. See
the truth table.
• O₁ to O₁₂₀
These are outputs for the 4-level drivers, which correspond directly to each bit of the shift
register. One of the four levels V₁, V₂, V₅, and V_EE is selected and output depending on the
combination of the shift register data and a DF signal. See the Truth Table.
• V_1L, V_2L, V_5L, V_EEL, V_1R, V_2R, V_5R, V_EER
These are LCD drive bias voltage inputs.
• V_DDL, V_DDR, V_SS
These are power supply pins for the device. V_DD is usually from 2.7 V to 5.5 V and V_SS is 0 V.
6/7