M16C62P_06 Datasheet, PDF (253/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
18. A/D Converter
18.1 Mode Description
18.1.1 One-Shot Mode
In one-shot mode, analog voltage applied to a selected pin is converted to a digital code once. Table 18.2 shows
the One-Shot Mode Specifications. Figure 18.5 shows the ADCON0 and ADCON1 Registers (One-shot Mode).
Table 18.2 One-Shot Mode Specifications
Item
Function
A/D Conversion Start
Condition
A/D Conversion Stop
Condition
Interrupt Request
Generation Timing
Analog Input Pin ⁽¹⁾
Reading of Result of A/D
Converter
Specification
The CH2 to CH0 bits in the ADCON0 register, the ADGSEL1 to ADGSEL0 bits
in the ADCON2 register and the OPA1 to OPA0 bits in the ADCON1 register
select a pin. Analog voltage applied to the pin is converted to a digital code
once.
• When the TRG bit in the ADCON0 register is “0” (software trigger)
The ADST bit in the ADCON0 register is set to “1” (A/D conversion starts)
• When the TRG bit is “1” (ADTRG trigger)
Input on the ADTRG pin changes state from high to low after the ADST bit is
set to “1” (A/D conversion starts)
• Completion of A/D conversion (If a software trigger is selected, the ADST bit
is cleared to “0” (A/D conversion halted))
• Set the ADST bit to “0”
Completion of A/D conversion
Select one pin from AN0 to AN7, AN0_0 to AN0_7, AN2_0 to AN2_7,
ANEX0 to ANEX1
Read one of the AD0 to AD7 registers that corresponds to the selected pin
NOTES:
1. If VCC2 < VCC1, do not use AN0_0 to AN0_7 and AN2_0 to AN2_7 as analog input pins.
Rev.2.41 Jan 10, 2006 Page 238 of 390
REJ09B0185-0241