lc75833e Sanyo Semiconductor Corporation, lc75833e Datasheet - Page 14

• Manufacturer Part Number: lc75833e
• Description: 1/3 Duty General-purpose Lcd Display Drivers
• Manufacturer: Sanyo Semiconductor Corporation

The INH pin and Display Control
Since the LSI internal data (the display data and the control data) is undefined when power is first applied, applications
should set the INH pin low at the same time as power is applied to turn off the display (LC75833E, LC75833W: This
sets the S1/P1 to S8/P8, S9 to S35, and COM1 to COM3 to the V SS level. LC75833JE: This sets the S1/P1 to S8/P8, S9
to S11, S13 to S22, S25 to S34, and COM1 to COM3 to the V SS level.) and during this period send serial data from the
controller. The controller should then set the INH pin high after the data transfer has completed. This procedure prevents
meaningless displays at power on. (See Figure 3.)
Notes on the Power On/Off Sequences
Applications should observe the following sequence when turning the LC75833E, LC75833W, and LC75833JE power
on and off.
However, if the logic and LCD driver block use a shared power supply, then the power supplies can be turned on and off
at the same time.
Note: At the LC75833JE, the display data D34 to D36, D67 to D72, D103 to D105 must be set to 0.
Notes on Controller Transfer of Display Data
Since the LC75833E, LC75833W, and LC75833JE accept display data divided into three separate transfer operations,
we recommend that applications transfer all of the display data within a period of less than 30 ms to prevent observable
degradation of display quality.
Internal data
Internal data
Internal data
• At power on: Logic block power supply (V
• At power off: LCD driver block power supply (V
(D37 to D72)
(D73 to D105)
V
V
INH
CE
D1 to D36
P0 to P3
DR, SC, BU
DD
LCD
Undefined
Undefined
Undefined
t 1
Display and control data transfer
LC75833E, 75833W, 75833JE
DD
) on
LCD
Figure 3
) off
LCD driver block power supply (V
tc
Defined
Defined
Defined
V
IL
Logic block power supply (V
V
IL
t 2
Undefined
t 3
Undefined
Undefined
LCD
DD
Note:
t1 ≥ 0
t2 > 0
t3 ≥ 0 (t2 > t3)
tc ... 10 µs min
) on
) off
No. 5580-14/19
A06560