em78p257 ELAN Microelectronics Corp, em78p257 Datasheet - Page 20

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

This specification is subject to change without prior notice.
5. IOC90 ( CMP Control Register ):
• Bit 7 ( COIE7 ): Set P64 as the output of the comparator CO4(CE4 must be enabled)
• Bit 6 ( COIE3 ): Set P63 as the output of the comparator CO3(CE3 must be enabled)
• Bit 5 ( COIE2 ): Set P52 as the output of the comparator CO2(CE2 must be enabled)
• Bit 4 ( COIE1 ): Set P51 as the output of the comparator CO1 (CE1 must be enabled)
• Bit 3 (CE4): Comparator (CO4) enable bit
0 = output disabled, and carry out the function of P51.
1 = output enabled;
0 = output disabled, and carry out the function of P64.
1 = output enabled;
0 = output disabled, and carry out the function of P63.
1 = output enabled;
0 = output disabled, and carry out the function of P52.
1 = output enabled;
0 = Comparator is CO4 off (default value).
1 = Comparator is CO4 on.
For EM78P257A
For EM78P257B
For EM78P257A
COIE4
Pin 10 can choice P64 only.
Pin 11 can choose P65 only.
Pin 12 can choose P66 or TCC2 only. If MOUSEN is ‘1’ and TCC2E of IOC80 is also ‘1’, then set
pin to TCC2, otherwise set to P66.
Pin 11 can choose P64 only.
Pin 12 can choose P65 only.
Pin 13 can choose P66 or TCC2 only. If MOUSEN is ‘1’ and TCC2E of IOC80 is ‘1’ also, then set
pin to TCC2, otherwise set to P66.
Pin 10 can choose P64 or CO4 only, and decided by COIE4 of IOC90.
Pin 11 can choose CIN4+ only.
7
COIE3
6
COIE2
5
COIE1
4
20
CE4
3
CE3
2
CE2
1
EM78P257
07.27.2004 (V1.4)
OTP ROM
CE1
0