ML620Q503/Q504 User's Manual
Chapter 24 RC Oscillation Type A/D Converter
FEUL620Q504 24-1
24 RC Oscillation Type A/D Converter (RC-ADC)
24.1 General Description
The RC oscillation type A-D Converter (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.
In addition, a different sensor for each of the two channels of RC-ADC’s RC oscillator circuit can be used to
broaden RC-ADC applications; for example, the converter can be used for expansion of measurement range or
measurement at two points.
For input clocks, see Chapter 6, "Clock Generation Circuit".
24.1.1 Features
•
2-channel system by time division
24.1.2 Configuration
The RC-ADC consists of two RC oscillator circuits to form two channels, Counter A (RADCA0 and RADCA1)
and Counter B (RADCB0 and RADCB1) as 24-bit binary counters, and an RC-ADC control circuit (RADCON,
RADMOD). Figure 24-1 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 24-1 Configuration of RC-ADC
RC
oscillation
(RCOSC0)
Data bus
P00/IN0
LSCLK
RC-ADC
Control circuits
(RADCON)
(RADMOD)
Interrupt
control
RADINT
P01/CS0
P03/RS0
P02/RCT0
P04/RT0
P20/IN1
P21/CS1
P22/RS1
P23/RT1
RC
oscillation
(RCOSC1)
24bits
binary counter
P05/RCM
24bits
binary counter
Counter A (RADCA0
and RADCA1)
Counter B (RADCB0
and RADCB1)
RCCLK
OVFA
OVFB
Clock
Control
circuits
OSCLK
BSCLK
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...