ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 310

• Manufacturer Part Number: ML610Q429-NNNTBZ03A7
• Description: MCU 8BIT 48K FLASH 128-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q429-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: 20
• Program Memory Size: 48KB (24K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

23.3.3
RT0 is expressed as a function of temperature T by the following equation:
Figure 23-10 shows the ideal characteristics of A/D conversion with the assumption that RT0 is an analog quantity. In
the ideal characteristics, the A/D conversion value nT0 will purely depend on RT0 only. Assuming that nT0 is
proportional to RT0, let proportional constant be K, then nT0 has the following relationship with temperature T:
Therefore, temperature T can be expressed as a digital value by performing the conversion processing that accords with
the characteristics shown in Figure 23-9 for nT0 by software.
This section describes the method of performing A/D conversion for sensor values in Counter A and B reference modes
by taking temperature measurement by a thermistor as an example.
Figure 23-8 shows the configuration of 1-thermistor RC oscillator circuit using RCOSC0.
Figure 23-9 shows the temperature characteristics of the thermistor resistance RT0.
Figure 23-9 Temperature Characteristics
RT0
nT0
Example of Use of RC Oscillation Type A/D Converter
Figure 23-8 Configuration of 1-Thermistor RC Oscillator Circuit Using RCOSC0
=
=
of Thermistor
RT0 = f(T)
f (T)
K RT0
Reference resistor RS0
Temperature T
=
Thermistor RT0
K f (T)
CS0
RI0
…… Expression A
23 – 15
Figure 23-10 A/D Conversion Characteristics
(Ideal characteristics when nT0 is proportional to RT0)
RT0
RS0
CS0
IN0
Chapter 23 RC Oscillation Type A/D Converter
ML610Q428/ML610Q429 User’s Manual
nT0 = K•RT0
= K•f(T)
RT0