LC79451KB datasheet(29/38 Pages) ONSEMI

29 / 38 page

LC79451KB

No.A2223-29/38

8-2. Manual Charge-pump Mode

8-2-1. Initialization

< sequence >

(1) Set RESET pin high

(2) Charge-pump frequency setting

(Control register 1 = C6h)

(3) Operating control setting and Charge-pump start

(Control register 2 = 03h)

(4) Waveform parameter setting

(5) Waiting time

(Voltage be stable)

(6) RFSH Flag setting

(Control register 3 = 01h)

(7) START Flag setting

(Control register 4 = 01h)

(8) Drive period

(Waveform output)

(9) RFSH Flag cancel

(Control register 3 = 00h)

When START Flag (7) is set in waiting time (5), sequence waits for the end of waiting time (5) and shifts to drive

period (8).

8-2-2. Sequential Image Change

< sequence >

(1) The first image data transmission

(2) START Flag setting

(Control register 4 = 01h)

(3) Drive period

(Waveform output)

(4) The second image data transmission

(5) START Flag setting

(Control register 4 = 01h)

(6) Drive period

(Waveform output)

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

parameter” must not update.

Please set the setting of STRAT Flag (5) at the time of BUSY = Low of first image or STRAT Flag = Low.

SDA

SCL

(3)

(1)

(2)

BUSY(output)

(6)

(4)

(5)

RESET

SDA

SCL

(1)

(2)

(3)

(4)

(5)

(6)

BUSY(output)

(7)

(8)

(9)

VDD2

VDD

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