EM78P808 datasheet(33/63 Pages) EMC

33 / 63 page

EM78808

8-bit Micro-controller

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* This specification is subject to change without notice.

8/1/2004 (V3.1)

Fig.19b LCD waveform (1/5 bias) for 1/24 duty

Bit 4(CDAS) : Current DA switch

normal PORT66

Current DA output

Bit 5(KTS) : Key tone output switch

normal PORT67

key tone output .

Bit 6~Bit 7(KT0~KT1) : Key tone output frequency and its power control

KT1

KT0

Key tone frequency and power

32.768KHz/32 = 1.024kHz clock and enable

32.768KHz/16 = 2.048kHz clock and enable

32.768KHz/8 = 4.096kHz clock and enable

Power off key tone

frame

com0

com1

com2

seg

light

dark

Gnd

EM78P808 Datasheet(PDF) 33 Page - ELAN Microelectronics Corp

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