
ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 17 RC Oscillation Type A/D Converter
17-1
17. RC Oscillation Type A/D Converter
17.1 Overview
This LSI has a built-in 1-channel RC oscillation type A/D converter (RC-ADC).
The RC-ADC converts resistance values or capacitance values to digital values by counting the oscillator clock whose
frequency changes according to the resistor or capacitor connected to the RC oscillator circuits. By using a thermistor or
humidity sensor as a resistor, a thermometer or hygrometer can be formed.
For input clocks, see Chapter 6, “Clock Generation Circuit”.
17.1.1 Features
•
1-channel system by time division
17.1.2 Configuration
The RC-ADC consists of the RC oscillator circuit to form the channel, Counter A (RADCA0 and RADCA1) and
Counter B (RADCB0 and RADCB1) as 16-bit binary counters, and an RC-ADC control circuit (RADCON, RADMOD).
Figure 17-1 shows the configuration of the RC-ADC.
RADMOD
: RC-ADC mode register
RADCON
: RC-ADC control register
RADCA0
∼
1 : RC-ADC Counter A register
RADCB0
∼
1 : RC-ADC Counter B register
Figure 17-1 Configuration of RC-ADC
Data bus
LSCLK
RC-ADC
control circuit
(RADCON)
(RADMOD)
Interrupt
control
RADINT
P44/IN1
P45/CS1
P46/RS1
P47/RT1
RC
oscillation
(RCOSC1)
16bits
binary counter
P35/RCM
16bits
binary counter
Counter A (RADCA0 and
RADCA1)
Counter B (RADCB0 and
RADCB1)
RCCLK
OVFA
OVFB
Clock
control
circuit
LSCLK×2
HSCLK
BSCLK
Содержание ML610471
Страница 12: ...Chapter 1 Overview...
Страница 38: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 48: ...Chapter 4 MCU Control Function...
Страница 62: ...Chapter 5 Interrupts...
Страница 82: ...Chapter 6 Clock Generation Circuit...
Страница 94: ...Chapter 7 Time Base Counter...
Страница 105: ...Chapter 8 Capture...
Страница 114: ...Chapter 9 Timer...
Страница 133: ...Chapter 10 Watchdog Timer...
Страница 141: ...Chapter 11 UART...
Страница 164: ...Chapter 12 Port 0...
Страница 173: ...Chapter 13 Port 2...
Страница 180: ...Chapter 14 Port 3...
Страница 188: ...Chapter 15 Port 4...
Страница 199: ...Chapter 16 Port 6...
Страница 205: ...Chapter 17 RC Oscillation Type A D Converter...
Страница 225: ...Chapter 18 LCD Drivers...
Страница 243: ...Chapter 19 Power Supply Circuit...
Страница 245: ...Chapter 20 uEASE Flash Writer System...
Страница 249: ...Chapter 21 Software Development...
Страница 258: ...Appendixes...
Страница 280: ...Revision History...