UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 303

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

10.2 Configuration of A/D Converter
(1) ANI0 to ANI7 pins
(2) Sample & hold circuit
(3) Series resistor string
(4) A/D Voltage comparator
(5) Successive approximation register (SAR)
(6) 10-bit A/D conversion result register (ADCR)
(7) 8-bit A/D conversion result register (ADCRH)
The A/D converter includes the following hardware.
These are the analog input pins of the 8-channel 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.
The sample & hold circuit samples the input voltage of the analog input pin selected by the selector when A/D
conversion is started, and holds the sampled voltage value during A/D conversion.
The series resistor string is connected between AV
the sampled voltage value.
The A/D voltage comparator compares the sampled voltage value and the output voltage of the series resistor
string.
This register converts the result of comparison by the A/D voltage comparator, starting from the most significant
bit (MSB).
When the voltage value is converted into a digital value down to the least significant bit (LSB) (end of A/D
conversion), the contents of the SAR register are transferred to the A/D conversion result register (ADCR).
The A/D conversion result is loaded from the successive approximation register to this register each time A/D
conversion is completed, and the ADCR register holds the A/D conversion result in its higher 10 bits (the lower 6
bits are fixed to 0).
The A/D conversion result is loaded from the successive approximation register to this register each time A/D
conversion is completed, and the ADCRH register stores the higher 8 bits of the A/D conversion result.
Figure 10-2. Circuit Configuration of Series Resistor String
AV
AV
REF
SS
CHAPTER 10 A/D CONVERTER
User’s Manual U17854EJ9V0UD
P-ch
Series resistor string
REF
and AV
SS
, and generates a voltage to be compared with
ADCS
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