LC79451KB

No.A2223-28/38

8-1. Automatic Charge-pump Mode

8-1-1. Initialization

< sequence >

(1) Set RESET pin high

(2) Charge-pump frequency setting

(Control register 1 = C6h)

(3) Operating control setting

(Control register 2 = 00h)

(4) Waveform parameter setting

(5) RFSH Flag setting

(Control register 3 = 01h)

(6) START Flag setting

(Control register 4 = 01h)

(7) Waiting time

(Charge-pump start

⇒ voltage be stable)

(8) Drive period

(Waveform output) *Charge-pump and Oscillator stop with BUSY = Low.

(9) RFSH Flag cancel

(Control register 3 = 00h)

You may set waveform parameter (4) and RFSH Flag (5) during waiting time (7).

Waiting time (7) is set at charge-pump frequency (2).

8-1-2. Sequential Image Change

< sequence >

(1) The first image data transmission

(2) START Flag setting

(Control register 4 = 01h)

(3) Waiting time

(Charge-pump start

⇒ voltage be stable)

(4) Drive period

(Waveform output) * Charge-pump and Oscillator stop with BUSY = Low.

(5) The second image data transmission

(6) START Flag setting

(Control register 4 = 01h)

(7) Waiting time

(Charge-pump start

⇒ voltage be stable)

(8) Drive period

(Waveform output) *Oscillator and Charge-pump stop with BUSY = Low.

You may set the second image data transmission (5) during waiting (3) and drive period (4). But “control register”

and “waveform parameter” must not update.

Please set the setting of STRAT Flag (6) at the time of BUSY = Low of first image or STRAT Flag = Low.

CS

SDA

SCL

(3)

(4)

(1)

(2)

BUSY(output)

(7)

(8)

(5)

(6)

VDD2

RESET

CS

SDA

SCL

(1)

(2)

(3)

(4)

(5)

(6)

BUSY(output)

(7)

(8)

(9)

VDD