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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 16 LCD CONTROLLER/DRIVER<br />

(3) LCD clock control register (LCDC0)<br />

LCDC0 specifies the LCD source clock and LCD clock.<br />

The frame frequency is determined according to the LCD clock and the number of time slices.<br />

LCDC0 is set using a 1-bit or 8-bit memory manipulation instruction.<br />

Reset signal generation sets LCDC0 to 00H.<br />

Figure 16-4. Format of LCD Clock Control Register<br />

Address: FFF42H After reset: 00H R/W<br />

Symbol 7 6 5 4 3 2 1 0<br />

LCDC0 0 LCDC6 LCDC5 LCDC4 0 LCDC2 LCDC1 LCDC0<br />

LCDC6 LCDC5 LCDC4<br />

LCD source clock (fLCD) selection<br />

R01UH0317EJ0004 Rev. 0.04 971<br />

Feb. 22, 2013<br />

fMAIN =<br />

4MHz<br />

fMAIN =<br />

8MHz<br />

0 0 0 fXT 32.768kHz<br />

fMAIN =<br />

20MHz<br />

fMAIN =<br />

24MHz<br />

(fIH only)<br />

0 0 1 fMAIN/2 5 125kHz 250kHz 625kHz 750kHz<br />

0 1 0 fMAIN/2 6 62.5kHz 125kHz 312.5kHz 375kHz<br />

0 1 1 fMAIN/2 7 31.25kHz 62.5kHz 156.25kHz 187.5kHz<br />

1 0 0 fMAIN/2 8 15.625kHz 31.25kHz 78.125kHz 93.75kHz<br />

1 0 1 fMAIN/2 9 7.81kHz 15.625kHz 39.06kHz 46.875kHz<br />

1 1 0 fMAIN/2 1<br />

0<br />

1 1 1 fIL 15kHz (typ.)<br />

LCDC2 LCDC1 LCDC0<br />

fLCD =<br />

32.768kHz<br />

7.81kHz 19.53kHz 23.43kHz<br />

LCD(LCDCL) selection<br />

fLCD =<br />

31.25kHz<br />

fLCD =<br />

46.875kHz<br />

fLCD =<br />

15kHz<br />

0 0 0 fLCD/2 4 2048Hz 1953.13Hz 2929.69Hz 937.5Hz<br />

0 0 1 fLCD/2 5 1024Hz 976.56Hz 1464.84Hz 468.75Hz<br />

0 1 0 fLCD/2 6 512Hz 488.28Hz 732.42Hz 234.38Hz<br />

0 1 1 fLCD/2 7 256Hz 244.14Hz 366.21Hz 117.19Hz<br />

1 0 0 fLCD/2 8 128Hz 122.07Hz 183.1Hz 58.59Hz<br />

1 0 1 fLCD/2 9 64Hz 61.04Hz 91.55Hz 29.29Hz<br />

Other than above Setting prohibited (same as “000” setting)<br />

Caution Bits 3 and 7 must be set to 0.<br />

Remarks 1. fXT: XT1 clock oscillation frequency<br />

2. fIL: Low-speed on-chip oscillator clock frequency

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