ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 312

• 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: -

• First step = RC oscillation with RS0 in Counter A reference mode
• Second step = RC oscillation with RT0 in Counter B reference mode
• First step = RC oscillation with RS0 in Counter B reference mode
• Second step = RC oscillation with RT0 in Counter A reference mode
Figure 23-14 shows, as an example of method, a timing diagram of one cycle of conversion from analog value RT0 to a
digital value, that is, A/D conversion.
Basically, one A/D conversion cycle must consist of two steps, as shown in Figure 23-14. The reason for requiring
two steps is that the reference resistor and the thermistor must first be oscillated separately and then the ratio between
the oscillation frequencies of them is used, as described above.
In the example below, operation for these two steps is performed using the following combination:
Besides this, there would be several possible A/D conversion methods.
In the above method, the operation time (gate time) for the second step fluctuates depending on the value of thermistor
RT0.
recommended:
To avoid the fluctuation of the operation time, using a method that uses the following combination is
23 – 17
Chapter 23 RC Oscillation Type A/D Converter
ML610Q428/ML610Q429 User’s Manual