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