M16C/62P Group (M16C/62P, M16C/62PT)
18. A/D Converter
Rev.2.41
Jan 10, 2006
Page 242 of 390
REJ09B0185-0241
18.1.3
Single Sweep Mode
In single sweep mode, analog voltage that is applied to selected pins is converted one-by-one to a digital code.
Table 18.4 shows the Single Sweep Mode Specifications. Figure 18.7 shows the ADCON0 Register and
ADCON1 Register (Single Sweep Mode).
NOTES:
1. AN0_0 to AN0_7, and AN2_0 to AN2_7 can be used in the same way as AN0 to AN7. However, if
VCC2 < VCC1, do not use AN0_0 to AN0_7 and AN2_0 to AN2_7 as analog input pins.
Table 18.4
Single Sweep Mode Specifications
Item
Specification
Function
The SCAN1 to SCAN0 bits in the ADCON1 register and the ADGSEL1 to
ADGSEL0 bits in the ADCON2 register select pins. Analog voltage applied to
this pins is converted one-by-one to a digital code.
A/D Conversion Start
Condition
• 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)
A/D Conversion Stop
Condition
• 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”
Interrupt Request
Generation timing
Completion of A/D conversion
Analog Input Pin
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins),
AN0 to AN7 (8 pin)
(1)
Reading of Result of A/D
Converter
Read one of the AD0 to AD7 registers that corresponds to the selected pin
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