ML610Q412P-NNNTB03A7 Rohm Semiconductor, ML610Q412P-NNNTB03A7 Datasheet - Page 309

• Manufacturer Part Number: ML610Q412P-NNNTB03A7
• Description: MCU 8BIT 16K FLASH 120-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q412P-NNNTB03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 625kHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

24.3.4
where t
by thermistor RT0.
Since the oscillation period is expressed by “t
following expressions:
When expression E is substituted for expression D, nA1 will be:
Since “nA0” (“4B0H” in this example) and RS0 are constants whose values are fixed, “nA1” is a digital value
proportional to RT0. This very “nA1” corresponds to “nT0” in expression A.
That concludes the description of the A/D conversion method using a thermistor. “nA1” that has been obtained must
further be converted to a value such as a temperature indication value for thermometer by program according to the
temperature-to-resistance characteristics of the themistor.
The RC oscillator clock (RCCLK) can be output using the secondary function of the P35 pin of Port 3. See Chapter
20, “Port 3,” for the details of the secondary function of P35.
Monitoring RC oscillation is useful for checking the characteristics of the RC oscillator circuit.
relationship between a sensor, such as a thermistor, and the oscillation frequency can be measured. For instance, the
coefficient for conversion from the above-described nA1 value to a temperature indication value can be obtained by
checking the relationship between the ambient temperature of a themistor-incorporated RC oscillator, the oscillation
frequency with thermistor RT0, and the oscillation frequency with reference resistor RS0.
Note:
• P35 (RCM) is a monitor pin for oscillation clock. The channel 0(P34-P30) and channel 1(P47-P44) share the monitor
pin.
• Please use P35 (RCM) for the evaluation purpose and disable the output while operating in an actual application to
minimize the noise.
RCCLK
t
t
nA1
RCCLK
RCCLK
Monitoring RC Oscillation
(RS0) is the oscillator clock period by reference resistor RS0 and t
(RS0)
(RT0)
=
nA0
=
=
k
k
RCCLK
RCCLK
RT0
RS0
(CS0+CVR) RS0
(CS0+CVR) RT0
RCCLK
= k
RCCLK
24 – 20
…… Expression E
ML610Q411/ML610Q412/ML610Q415 User’s Manual
R C”, t
Chapter 24 RC Oscillation Type A/D Converter
RCCLK
(RS0) and t
RCCLK
RCCLK
(RT0) the oscillator clock period
(RT0) are expressed by the
That is, the