hd66503 Renesas Electronics Corporation., hd66503 Datasheet - Page 11

• Manufacturer Part Number: hd66503
• Description: 240-channel Common Driver With Internal Lcd Timing Circuit - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

Internal Function Description
1. Generation of Signals CL1 and FLM: Signal CL1 shifts the scanning signal of the common driver. It
2. Generation of Signal M: Signal M alternates current in the LCD. It alternates the current to decrease
cross talk after a certain number of lines ranging from 2 to 63 lines. The number of lines can be
specified with pins MWS0 to MWS5 by setting each pin to either V
when pin MEOR is connected to GND, signal M is a simple line alternating waveform, and when pin
MEOR is connected to V
frame alternating waveform.
is a 50% duty-ratio clock that changes level synchronously with the rising edge of oscillator clock
CR.
FLM is a clock signal that is output once every 240 CL1 clock cycles for a duty of 1/240 (DUTY =
V
CC
), and every 120 CL1 clock cycles for a duty of 1/120 (DUTY = GND).
M
(MEOR = GND)
M
(MEOR = V
FLM
(When MWS0 to MWS5 = 6)
CL1
CR
CL1
FLM
CC
)
Figure 6 Generation of Signals CL1 and FLM
1
CC
, signal M is an EOR (exclusive OR) of line alternating waveform and
240
(120)
Figure 7 Generation of Signal M
2
3
1
4
5
2
6
CC
or GND (H or L). In addition,
1
2
HD66503
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