em78p257 ELAN Microelectronics Corp, em78p257 Datasheet - Page 56

• Manufacturer Part Number: em78p257
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

This specification is subject to change without prior notice.
4. MOUSE mode Timing
Table 25 MOUSE Control Register
• Bit 3 Not used
• Bit 2(TCCCIE) TCCCIF interrupt enable bit.
• Bit 1(TCCCTS) TCCC signal source
• Bit 0(TCCCTE) TCCC signal edge
• Bit 7 (MOUSEN) Mouse application Enable bit.
• Bit 6~Bit 0 Not used.
(1)Photo-couples pulse width:
(2) Sending DATA (data from EM78P257A/B to system)
1: transition on the TCC5 pin.
0: disable the TCCCIF interrupt
1: enable the TCCCIF interrupt
0: internal instruction cycle clock
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
MOUSEN
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.
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.
7
X1(Y1)
X2(Y2)
6
-
5
-
Tr
4
-
56
3
-
Tf
2
-
EM78P257
1
-
07.27.2004 (V1.4)
OTP ROM
0
-