EM78P417N/418N/419N
8-Bit Microprocessor with OTP ROM
Bit 0 (ADE0 ): AD converter enable bit of P60 pin
0 = Disable ADC0, P60 acts a s I/O pin
1 = Enable ADC0 acts as analog input pin
NOTE
Note the pin priority of the COS1 and COS0 bits of IOCA0 Control register when
P60/ADE0 acts as analog input or as digital I/O. The Comparator/OP select bits are as
shown in a table under Section 6.2.6.
The P60/ADE0/CO pin priority is as follows:
P60/ADE0/CO PRIORITY
High
CO
Medium
ADE0
Low
P60
6.7.1.2 R9 (ADCON: ADC Control Register)
Bit
7
6
CKR1
0
5
CKR0
0
4
3
2
ADIS2
0
1
ADIS1
0
0
ADIS0
0
SYMBOL VREFS
*Init_Value
ADRUN ADPD
0
0
0
*Init_Value: Initial value at power on reset
ADCON register controls the operation of the AD conversion and decides which pin
should be currently active.
Bit 7(VREFS): The input source of the Vref of the ADC
0 = The Vref of the ADC is connected to Vdd (default value), and the
P53/VREF pin carries out the function of P53
1 = The Vref of the ADC is connected to P53/VREF
NOTE
The P53/PWM3/VREF pin cannot be applied to PWM3 and VREF at the same time. IF
P53/PWM3/VREF acts as VREF analog input pin, then PWM3E must be “0”..
The P53/PWM3/VREF pin priority is as follows:
P53/PWM3/VREF PIN PRIORITY
High
Medium
PWM3
Low
P53
VREF
44 •
Product Specification (V1.0) 06.23.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
