EM78P257AP datasheet(56/91 Pages) EMC

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EM78P257

OTP ROM

This specification is subject to change without prior notice.

07.27.2004 (V1.4)

• Bit 3 Not used

• Bit 2(TCCCIE) TCCCIF interrupt enable bit.

0: disable the TCCCIF interrupt

1: enable the TCCCIF interrupt

• Bit 1(TCCCTS) TCCC signal source

0: internal instruction cycle clock

1: transition on the TCC5 pin.

• Bit 0(TCCCTE) TCCC signal edge

0: increment if the transition from low to high (leading edge) takes place on the TCC6 pin

1: increment if the transition from high to low (leading edge) takes place on the TCC6 pin

Table 25 MOUSE Control Register

MOUSEN

• Bit 7 (MOUSEN) Mouse application Enable bit.

0: Disable MOUSEN. TCCA,TCCB and TCCC are increment counters.

1: Enable MOUSEN. RA(disable Bit0(TCCATE), Bit1(TCCATS) is ‘1’, Bit2(TCCAIE) is ‘0’ ),

RB(disable Bit0(TCCCTE), Bit1(TCCCTS) is ‘1’, Bit2(TCCCIE) is ‘0’, Bi, disable Bit4(TCCBTE),

Bit5(TCCBTS) is ‘1’, Bit6(TCCBIE) is ‘0’ ) , and TCCA, TCCBL and TCCC work as up/down counters.

For other pin assignments, refer to IOC80.

• Bit 6~Bit 0 Not used.

4. MOUSE mode Timing

(1)Photo-couples pulse width:

X1(Y1)

X2(Y2)

Counter increment if the rising/falling edge of X1 is leading the one on X2.

Counter decrement if the rising/falling edge of X1 is falling behind the one on X2.

(2) Sending DATA (data from EM78P257A/B to system)

EM78P257AP Datasheet(PDF) 56 Page - ELAN Microelectronics Corp