UPD78F0411GA-GAM-AX Datasheet, PDF (384/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 15 LCD CONTROLLER/DRIVER
Notes 1. When LCD display is not performed or necessary, set SCOC and VAON to 0, in order to reduce
power consumption.
2. This bit is used to control boosting of the internal gate signal of the LCD controller/driver.
If set to "Internal gate voltage boosting", the LCD drive performance can be enhanced.
Set VAON based on the following conditions.
<When set to the static display mode>
• When 2.0 V ≤ VLCD ≤ VDD ≤ 5.5 V: VAON = 0
• When 1.8 V ≤ VLCD ≤ VDD ≤ 3.6 V: VAON = 1
<When set to the 1/3 bias method>
• When 2.5 V ≤ VLCD ≤ VDD ≤ 5.5 V: VAON = 0
• When 1.8 V ≤ VLCD ≤ VDD ≤ 3.6 V: VAON = 1
<When set to the 1/2 bias method>
• When 2.7 V ≤ VLCD ≤ VDD ≤ 5.5 V: VAON = 0
• When 1.8 V ≤ VLCD ≤ VDD ≤ 3.6 V: VAON = 1
<When set to the 1/4 bias method>
• When 4.5 V ≤ VLCD ≤ VDD ≤ 5.5 V: VAON = 0
3. When the P40/KR0/VLC3 pin is set to the 1/4 bias method, it is used as VLC3. When the pin is set
to another bias method, it is used for the port function (P40) or the key interrupt function (KR0).
Use the pin at 4.5 V ≤ VLCD ≤ VDD ≤ 5.5 V when set to the 1/4 bias method.
Caution Bits 3 and 5 must be set to 0.
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User’s Manual U18698EJ1V0UD