UPD78F1203MC-CAB-AX Renesas Electronics America, UPD78F1203MC-CAB-AX Datasheet - Page 578

• Manufacturer Part Number: UPD78F1203MC-CAB-AX
• Description: MCU 16BIT 78K0R/LX3 30-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Ix3r

Specifications of UPD78F1203MC-CAB-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.2 Configuration of A/D Converter
(1) ANI0 to ANI11 pins
(2) PGAO
(3) Sample & hold circuit
(4) A/D voltage comparator
(5) Array
576
The A/D converter includes the following hardware.
These are the analog input pins of the twelve channels of the A/D converter. They input analog signals to be
converted into digital signals. Pins other than the one selected as the analog input pin can be used as I/O port
pins.
This is the programmable gain amplifier output signal from PGAI pin. The A/D converter can perform A/D
conversion by selecting the output signal of the programmable gain amplifier as the analog input.
The sample & hold circuit samples each of the analog input voltages sequentially sent from the input circuit, and
sends them to the A/D voltage comparator. This circuit also holds the sampled analog input voltage during A/D
conversion.
This A/D voltage comparator compares the voltage generated from the voltage tap of the array with the analog
input voltage. If the analog input voltage is found to be greater than the reference voltage (1/2 AV
of the comparison, the most significant bit (MSB) of the successive approximation register (SAR) is set. If the
analog input voltage is less than the reference voltage (1/2 AV
After that, bit 10 of the SAR register is automatically set, and the next comparison is made. The voltage tap of
the array is selected by the value of bit 11, to which the result has been already set.
The voltage tap of the array and the analog input voltage are compared and bit 10 of the SAR register is
manipulated according to the result of the comparison.
Comparison is continued like this to bit 0 of the SAR register.
The array generates the comparison voltage input from an analog input pin.
Remark
Bit 11 = 0: (1/4 AV
Bit 11 = 1: (3/4 AV
Analog input voltage ≥ Voltage tap of array: Bit 10 = 1
Analog input voltage ≤ Voltage tap of array: Bit 10 = 0
ANI0 to ANI5
ANI0 to ANI7
ANI0 to ANI9
ANI0 to ANI10 : 48-pin products of 78K0R/IC3 and 78K0R/ID3
ANI0 to ANI11 : 78K0R/IE3
REF
REF
)
)
: 78K0R/IB3
: 38-pin products of 78K0R/IC3
: 44-pin products of 78K0R/IC3
CHAPTER 12 A/D CONVERTER
User’s Manual U19678EJ1V1UD
REF
), the MSB of the SAR is reset.
REF
) as a result