UPD78F1502AGK-GAK-AX Datasheet, PDF (694/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 16 LCD CONTROLLER/DRIVER
Figure 16-12. Example of Display Data When Blinking Display Has Been Selected
When selecting blinking display (BLON = 1),
A-pattern and B-pattern areas are alternately displayed.
B-pattern area
A-pattern area
b7
b6
b5
b4
b3
b2
b1
b0
F0405H
F0404H
F0403H
F0402H
F0401H
F0400H
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
16.5 Setting LCD Controller/Driver
Set the LCD controller/driver using the following procedure.
(1) External resistance division method
<1> Set the external resistance division method via the MDSET0 and MDSET1 bits (bits 4 and 5 of the LCDMD
register) (MDSET0 = MDSET1 = 0).
<2> To use segment output only pins, use the SEGEN register to enable segment output to them.
To use segment output pins, which are alternatively used with port pins, use the PFALL register to set them
to segment output. In addition, to use the segment output pins, which are alternatively used with the TI04,
TI02, and RxD3 pins, use the ISC register to disable input to the Schmitt trigger buffer.
<3> Set the display data in LCD display RAM.
<4> Set the number of time slices and the bias mode via the LCDM0 to LCDM2 bits (bits 0 to 2 of the LCDM
register).
• When setting Static, 2-time-slice, 3-time-slice, or 4-time-slice → Go to step <5>
• When setting 8-time-slice → Go to step <6>
<5> Select the display data area via the LCDSEL and BLON bits (bits 3 and 4 of the LCDM register).
<6> Set the LCD source clock and LCD clock via the LCDC0 register.
<7> Set (SCOC = 1) the SCOC bit (bit 6 of the LCDM register).
Non-selected waveforms are output from all the segment and common pins, and the non-display status is
entered.
<8> Start output corresponding to each data memory by setting (LCDON = 1) the LCDON bit (bit 7 of the LCDM
register).
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011