ML610Q422-NNNTBZ03A7 Rohm Semiconductor, ML610Q422-NNNTBZ03A7 Datasheet - Page 298

• Manufacturer Part Number: ML610Q422-NNNTBZ03A7
• Description: MCU 8BIT 32K FLASH 22CH 120-TQFP
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of ML610Q422-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 4.2MHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°C
• Package / Case: 100-TFQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

24.
24.1 Overview
This LSI has a built-in 2-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.
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 conveter can be used for expansion of measurement range or measurement at
two points.
For input clock, see Chapter 6, “Clock Generation Circuit.”
24.1.1
• 2-channel system by time division
24.1.2
The RC-ADC consists of two RC oscillator circuits to form two channels, Counter A (RADCA0–2) and Counter B
(RADCB0–2) as 24-bit binary counters, and an RC-ADC control circuit (RADCON, RADMOD). Figure 24-1 shows
the configuration of the RC-ADC.
LSCLK×2
P34/RCT0
P35/RCM
P33/RT0
P32/RS0
P31/CS0
P46/RS1
P45/CS1
P47/RT1
HSCLK
P30/IN0
P44/IN1
LSCLK
RC Oscillation Type A/D Converter
Features
Configuration
RADMOD:
RADCON:
RADCA0–2:
RADCB0–2:
Data bus
(RCOSC0)
(RCOSC1)
oscillation
oscillation
control
circuit
Clock
CR
RC
RC-ADC mode register
RC-ADC control register
RC-ADC Counter A registers 0–2
RC-ADC Counter B registers 0–2
Figure 24-1 Configuration of RC-ADC
RCCLK
BSCLK
control circuit
(RADMOD)
(RADCON)
RC-ADC
24 – 2
Counter A (RADCA0–2)
Counter B (RADCB0–2)
binary counter
binary counter
Chapter 24 RC Oscillation Type A/D Converter
24-bit
24-bit
ML610Q421/ML610Q422 User’s Manual
OVFA
OVFB
Interrupt
control
RADINT