Renesas MCU M16C Family (R32C/M32C/M16C/R8C) - Glyn

AN27
AN20
AN07
AN00
AN7
AN0
AN EX1
AN EX0
Vcc
GND
Vcc
GND
A/D Converter
High-Speed A/D Converter with Sample-and-Hold Vref Cutoff
(1) Conversion Speed (ØAD = 10MHz)
10-Bit: 3.3 µs
8-Bit: 2.8 µs
(2) Successive Conversion ±3 LSB Accuracy
(3) High-Speed Sample-and-Hold
10MHz Operation: 0.3 µs, 20MHz Operation: 0.15 µs (Target)
TB2
AN0(TB0)
One-Shot Pulse
AN1(TB1)
One-Shot Pulse
S/H
A/D Converter
Max. 26-Channel A/D Pins (M16C/62P)
(M32C/64: Max. 34-Channel)
(M16C/30P: Max. 10-Channel)
(M16C/28: Max. 24-Channel)
A/D Converter
The analog circuit reference voltage, Vref, can be turned on or off.
Turning off Vref when the A/D converter is not being used can
help reduce current consumption.
TB2
Vref
AVss
Analog Input
A/D Conversion Function with AN0 and AN1 Delay Triggers
TB0 and TB1 One-Shot Operation Start
A/D Conversion Timing
TB0 and TB1 one-shot mode starts with TB2 underflow as the
trigger. The TB0 and TB1 one-shot pulses act as the triggers
for prioritized AN0 and AN1 A/D conversion with
sample-and-hold.
Measurement Error Avoidance (Unused A/D Overvoltage Processing)
This feature helps prevent measurement error due to
wraparound between channels, even if the other A/D
inputs include input that exceeds the Vcc level. It also
provides more accurate A/D conversion values.
OFF
ON
S/H Trigger
TB0
One-Shot Mode
Resistor
S/H
S/H Trigger
TB1 S/H
A/D Converter
(2) Underflow of TB0 and TB1 are added as
AN0 and AN1 A/D conversion triggers.
Underflow Signal
Trigger
Trigger
One-Shot Mode
(1) One-shot mode is added for
TB0 and TB1.
(One trigger is output per cycle.)
Note: There are no dedicated A/D trigger
output pins.
A/D Converter
(ANO)
(AN1)
A/D
(4) Part of A/D conversion
sequence changed.
(3) Sample-and-hold added exclusively to AN1.
(Supports two A/D conversion requests in a short time.)
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