ML610Q422-NNNTBZ03A7 Rohm Semiconductor, ML610Q422-NNNTBZ03A7 Datasheet - Page 312
ML610Q422-NNNTBZ03A7
Manufacturer Part Number
ML610Q422-NNNTBZ03A7
Description
MCU 8BIT 32K FLASH 22CH 120-TQFP
Manufacturer
Rohm Semiconductor
Series
-r
Datasheets
1.ML610Q482P-NNNTB03A7.pdf
(20 pages)
2.ML610Q421P-NNNTB03A7.pdf
(35 pages)
3.ML610Q421P-NNNTB03A7.pdf
(426 pages)
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
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24.3.3
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 24-8 shows the configuration of 1-thermistor RC oscillator circuit using RCOSC0.
Figure 24-9 shows the temperature characteristics of the thermistor resistance RT0.
RT0 is expressed as a function of temperature T by the following equation:
Figure 24-10 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 24-9 for nT0 by software.
Figure 24-9 Temperature Characteristics
RT0
nT0
Example of Use of RC Oscillation Type A/D Converter
Figure 24-8 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
…… Expression A
24 – 16
Figure 24-10 A/D Conversion Characteristics
(Ideal characteristics when nT0 is proportional to RT0)
RT0
RS0
CS0
IN0
Chapter 24 RC Oscillation Type A/D Converter
ML610Q421/ML610Q422 User’s Manual
nT0 = K•RT0
= K•f(T)
RT0
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