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| LC450210PCH Datasheet, PDF (32/53 Pages) ON Semiconductor – Duty Dot Matrix LCD Display Controllers | |||
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LC450210PCH
Power Supply Sequence
The following sequence must be observed when power supply is supplied and shut down. (Refer from [Fig.5] to
[Fig.8])
ï· When voltage booster is used
< 5V power supply REGE=VDD >
(1) When power supply is supplied:
Supply VDD (power supply for logic block). ï®
Input a base voltag_e__f_or voltage booster to VBTI1 after wait time for inputting voltage (ï³ 0). Reset
cancellation with RES=âHigh levelâ (Reset pulse width (ï³ 1[msec])). ï®
Wait time for inputting serial data (ï³ 1[msec]). ï®
Set DBC to 1 by âSet of display methodâ instruction.
(2) When power supply is shut down:
Set BU to 1 by âControl of display ON / OFFâ instruction. ï®
____
Wait for stop transition time of each circuit (ï³ 200[msec]). Reset with RES=âLow levelâ. ï®
Stop inputting a base voltage for voltage booster to VBTI1. ï®
Wait time for shutting down the power supply (ï³ 0). ï®
Shut down VDD (power supply for logic block).
< 3V power supply REGE=VSS >
(1) When power supply is supplied:
Supply VDD (power supply for logic block). ï®
Input a base voltage for _v_o_lt_age booster to VBTI1 and VBTI2 after wait time for inputting voltage (ï³ 0).
Reset cancellation with RES=âHigh levelâ (Reset pulse width (ï³ 1[msec])). ï®
Wait time for inputting serial data (ï³ 1[msec]). ï®
Set DBC to 1 by âSet of display methodâ instruction.
(2) When power supply is shut down:
Set BU to 1 by âControl of display ON / OFFâ instruction. ï®
____
Wait for stop transition time of each circuit (ï³ 200[msec]). Reset with RES=âLow levelâ. ï®
Stop inputting a base voltage for voltage booster to VBTI1 and VBTI2. ï®
Wait time for shutting down the power supply (ï³ 0). ï®
Shut down VDD (power supply for logic block).
ï· When voltage booster is not used
(1) When power supply is supplied:
Supply VDD (power sup_p_l_y_for logic block). ï®
Reset cancellation with RES=âHigh levelâ (Reset pulse width (ï³ 1[msec])). ï®
Wait time for supplying voltage and wait time for inputting serial data (ï³ 1[msec]). ï®
Supply VLCD (power supply for LCD driver block). ï®
Set DBC to 0 by âSet of display methodâ instruction.
(2) When power supply is shut down:
Set BU to 1 by âControl of display ON / OFFâ instruction. ï®
Wait for stop transition time of each circuit (ï³ 200[msec]). ï®
Shut down VLCD (power supply for LCD driver block). ï®
Wait time f_o_r _a_reset (ï³ 0). ï®
Reset with RES=âLow levelâ. ï®
Wait time for shutting down the power supply (ï³ 0). ï®
Shut down VDD (power supply for logic block).
(Note.1) Make sure to open VBTI1, VBTI2, CP1P, CP12N, CP2P, CP3P, CP34N and CP4P.
After the following page, examples of power supply sequence and set or cancel the power-saving mode during
supplying power.
No.A2310-32/53
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