msm5265 Oki Semiconductor, msm5265 Datasheet - Page 9

• Manufacturer Part Number: msm5265
• Description: 80-dot Lcd Driver
• Manufacturer: Oki Semiconductor

¡ Semiconductor
• V
• V
• COM-A, COM-B
Supply voltage pin for the 80 sets of LCD drivers. The input level to this pin should be the low
level output voltage of segment outputs (SEG
COM-B).
In this case, the high level of segment outputs and common outputs is the V
low level of segment outputs and common outputs is V
level than ground level.
Supply voltage pin for the middle level voltage of the common outputs. The input level of this
pin is the middle level output voltage of the common outputs (COM-A, COM-B) in the 1/2
duty dynamic display mode.
The value of V
In the static display mode, this pin should be open.
LCD driving common signals are output from these pins. These pins should be connected to
the common side of the LCD panel.
– In the static display mode
– In the 1/2 duty dynamic display mode
LC2
LC1
A pulse in phase with the COM-OUT output is output from both COM-A and COM-B. In
this case, the high level is V
The COM-A and COM-B output signals are alternately changed within each COM-OUT
output cycle, resulting in alternate repetition of select and non-select modes.
In the select mode, a signal in phase with the COM-OUT signal is output at "H" (V
"L" (V
(non-select mode of COM-B), signals that correspond to the 1st- to 80th-bit data of the data
latch are output to the segment outputs.
In the select mode of COM-B (non-select mode of COM-A), signals that correspond to the
81st- to 160th-bit data of the data latch are output to the segment outputs.
In the non-select mode, a voltage is output at "M" (V
COM-OUT
COM-A
COM-B
LC2
V
LC1
).
= (V
LC1
is calculated by the following formula:
DD
+ V
Dynamic display mode
LC2
(D/S : "H")
)/2
DD,
and the low level is V
1
to SEG
LC2
V
V
V
V
V
V
DD
LC1
LC2
DD
LC1
LC2
LC2
80
LC1
) and common outputs (COM-A,
level. V
.
). In the select mode of COM-A
LC2
Static display mode
should be set at higher
(D/S : "L")
DD
level, while
MSM5265
DD
) and
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