UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 167

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• 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 ANI3 pins
(2) Sample & hold circuit
(3) D/A converter
(4) Voltage comparator
Analog input
channel specification
register (ADS)
ANI0/P20
ANI1/P21
ANI2/P22
ANI3/P23
Figure 10-2 shows the block diagram of A/D converter.
The A/D converter consists of the following hardware.
These are the analog input pins of the 4-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 by the analog input channel specification
register (ADS) can be used as I/O port pins.
The sample & hold circuit samples the input signal of the analog input pin selected by the selector when A/D
conversion is started, and holds the sampled analog input voltage value during A/D conversion.
The D/A converter is connected between AV
analog input signal.
The voltage comparator compares the sampled analog input voltage and the output voltage of the D/A converter.
ADS1
2
ADS0
ADCS
Sample & hold circuit
Figure 10-2. Block Diagram of A/D Converter
FR2
Internal bus
FR1
CHAPTER 10 A/D CONVERTER
AV
3
A/D converter mode
register (ADM)
SS
User’s Manual U17446EJ5V0UD
FR0
REF
ADCE
and AV
Controller
Voltage comparator
approximation
register (SAR)
Successive
SS
A/D conversion result register
, and generates a voltage to be compared with the
(ADCR, ADCRH)
D/A converter
INTAD
AV
AV
165
REF
SS