ML610Q412P-NNNTB03A7 Rohm Semiconductor, ML610Q412P-NNNTB03A7 Datasheet - Page 305

• 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: -

To convert from an RT0 value to a digital value, the ratio is used between a) the oscillation frequency by the thermistor
connected to the RT0 pin and the capacitor connected to the CS0 pin and b) the oscillation frequency by the reference
resistor (which ideally should have no temperature characteristics) connected to the RS0 pin and the capacitor
connected to the CS0 pin. This is for making the conditions other than resistance equal to eliminate the error factor in
oscillation characteristics.
As shown in Figures 24-9 and 24-11, the RT0 value depends on temperature T and the RS0 value is assumed to be
constant regardless of temperature T. It is ideal if the characteristics of the oscillation frequency fOSC to temperature
T using these resistances will be like the solid lines in Figures 24-12 and 24-13; however, in reality, it would appear that
they will be like the dotted lines due to error factors such as IC temperature characteristics.
Since the condition of f
almost the same; therefore, errors can almost be eliminated by using the ratio between f
The ratio between f
should ideally depend only on RT0.
Figure 24-11 Temperature Characteristics of
RCCLK
(RS0)
f
Figure 24-13 Oscillation Characteristics of Reference Resistor
RCLK
RCCLK
Reference Resistor
(RT0) and f
(RT0) and that of f
Includes errors due to factors
other than RT0
Temperature T
RCCLK
(RS0) is equivalent to the above-mentioned A/D conversion value nT0 that
RCCLK
Temperature T
(RS0) are the same except for the resistances, the error ratios are
24 – 16
ML610Q411/ML610Q412/ML610Q415 User’s Manual
f
(RT0)
RCCLK
Chapter 24 RC Oscillation Type A/D Converter
Figure 24-12 Oscillation Characteristics
f
RCCLK
Ideal
(RS0) =
Includes errors due to factors other
than RT0
f
RCLK
k
RCCLK
(RS0) =
of Thermistor
·CS0·RS0
RCCLK
1
Temperature T
(RT0) and f
k
RCCLK
Ideal
·CS0·RT0
1
RCCLK
(RS0).