EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
Bit 4 (ADE4): AD converter enable bit of P67 pin
0 = Disable ADC4, P67 functions as I/O pin
1 = Enable ADC4 to function as analog input pin
Bit 3 (ADE3): AD converter enable bit of P53 pin
0 = Disable ADC3, P53 functions as I/O pin
1 = Enable ADC3 to function as analog input pin
Bit 2 (ADE2): AD converter enable bit of P52 pin
0 = Disable ADC2, P53 functions as I/O pin
1 = Enable ADC2 to function as analog input pin
Bit 1 (ADE1): AD converter enable bit of P51 pin
0 = Disable ADC1, P51 functions as I/O pin
1 = Enable ADC1 to function as analog input pin
Bit 0 (ADE0): AD converter enable bit of P50 pin
0 = Disable ADC0, P50 functions as I/O pin
1 = Enable ADC0 to function as analog input pin
6.7.1.2 R9 (ADCON: AD Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
VREFS
CKR1
CKR0
ADRUN
ADPD
ADIS2
ADIS1
ADIS0
The 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 ADC Vref
0 = The ADC Vref is connected to Vdd (default value), and the
VREF/TCC/P54 pin carries out the P54 function
1 = The ADC Vref is connected to VREF/TCC/P54
NOTE
The P54/TCC/VREF pin cannot be applied to TCC and VREF at the same time. If
P54/TCC/VREF functions as VREF analog input pin, then CONT Bit 5 (TS) must be “0”.
The P54/TCC/VREF pin priority is as follows:
P54/TCC/VREF Pin Priority
High
Medium
TCC
Low
P54
VREF
54 •
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
