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CHAPTER 13 8/10-bit A/D converter
G
Details of pins in block diagram
Table 13.2-1 shows the actual pin names and interrupt request numbers of the 8-/10-bit A/D converter
Table 13.2-1 Pins and Interrupt Request Numbers in Block Diagram
Pin Name/Interrupt Request Number in Block
ADTG
TO
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVR
AV
CC
AV
SS
Interrupt request
output
G
A/D control status registers (ADCS)
This register starts the A/D conversion function by software, selects the start trigger for the A/D conversion
function, selects the conversion mode, enables or disables an interrupt request, checks and clears the
interrupt request flag, temporarily stops A/D conversion and checks the state during conversion, and sets
the start and end channels for A/D conversion.
G
A/D data registers (ADCR)
This register stores the A/D conversion results.And it selects the comparison time, sampling time, and
resolution of A/D conversion.
G
Start selector
This selector selects the trigger to start A/D conversion.An internal timer output or external pin input can
be set as the start trigger.
352
Diagram
Trigger input pin
Internal timer output
Analog input pin ch 0
Analog input pin ch 1
Analog input pin ch 2
Analog input pin ch 3
Analog input pin ch 4
Analog input pin ch 5
Analog input pin ch 6
Analog input pin ch 7
Vref+ Input pin
V CC Input pin
V SS Input pin
Actual Pin Name/Interrupt Request
Number
P37/ADTG
TO (16-bit reload timer, 16-bit free-run
timer)
P50/AN0
P51/AN1
P52/AN2
P53/AN3
P54/AN4
P55/AN5
P56/AN6
P57/AN7
AVR
AV
CC
AV
SS
#18 (12
)
H
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