Rev.2.00 Nov 28, 2005 page 206 of 378
REJ09B0124-0200
M16C/6N Group (M16C/6NK, M16C/6NM)
16. A/D Converter
Under development
This document is under development and its contents are subject to change.
Item
Specification
Function
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.
A/D Conversion
• When the TRG bit in the ADCON0 register is “0” (software trigger)
Start Condition
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)
A/D Conversion
• Completion of A/D conversion (If a software trigger is selected, the ADST
Stop Condition
bit is set to “0” (A/D conversion halted).)
• Set the ADST bit to “0”
Interrupt Request
Completion of A/D conversion
Generation Timing
Analog Input Pin
Select one pin from AN0 to AN7, AN0_0 to AN0_7, AN2_0 to AN2_7,
ANEX0 to ANEX1
Reading of Result of
Read one of the AD0 to AD7 registers that corresponds to the selected pin
A/D Converter
16.1 Mode Description
16.1.1 One-shot Mode
In one-shot mode, analog voltage applied to a selected pin is A/D converted once. Table 16.2 lists the
specifications of one-shot mode. Figure 16.4 shows the ADCON0 and ADCON1 registers in one-shot mode.
Table 16.2 One-shot Mode Specifications
