R8CL35A Datasheet, PDF (680/848 Pages) Renesas Technology Corp – RENESAS MCU R8C FAMILY / R8C/Lx SERIES

Under development ^{Preliminary specification}
Specifications in this manual are tentative and subject to change.
R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,
R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group
30. A/D Converter
30.2 Registers
30.2.1 On-Chip Reference Voltage Control Register (OCVREFCR)
Address 0026h
Bit b7
b6
b5
b4
b3
b2
b1
b0
Symbol —
—
—
—
—
—
— OCVREFAN
After Reset 0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Function
R/W
b0 OCVREFAN On-chip reference voltage to 0: On-chip reference voltage and analog input are cut off R/W
analog input connect bit ^{(1) 1: On-chip reference voltage and analog input are}
connected
b1
—
Reserved bits
Set to 0.
R/W
b2
—
b3
—
b4
—
b5
—
b6
—
b7
—
Note:
1. When the on-chip reference voltage is used as analog input, first set the ADEX0 bit in the ADCON1 register to 1
(on-chip reference voltage selected) and then set the OCVREFAN bit to 1 (on-chip reference voltage and analog
input are connected).
When the on-chip reference voltage is not used as analog input, first set the OCVREFAN bit to 0 (on-chip
reference voltage and analog input are cut off) and then set the ADEX0 bit to 0 (extended analog input pin not
selected).
Set the PRC3 bit in the PRCR register to 1 (write enabled) before rewriting the OCVREFCR register.
If the content of the OCVREFCR register is rewritten during A/D conversion, the conversion result is
undefined.
REJ09B0441-0010 Rev.0.10 Jul 30, 2008
Page 644 of 809