UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 176

• 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: -

10.4.2 Input voltage and conversion results
A/D conversion result (stored in the 10-bit A/D conversion result register (ADCR)) is shown by the following
expression.
174
The relationship between the analog input voltage input to the analog input pins (ANI0 to ANI3) and the theoretical
or
where, INT( ):
Figure 10-11 shows the relationship between the analog input voltage and the A/D conversion result.
ADCR = INT (
(ADCR
A/D conversion result
V
AV
ADCR: 10-bit A/D conversion result register (ADCR) value
AIN
Figure 10-11. Relationship Between Analog Input Voltage and A/D Conversion Result
REF
:
0.5)
:
Function which returns integer part of value in parentheses
Analog input voltage
AV
AV
V
AV
1024
REF
AIN
REF
REF
pin voltage
1024 + 0.5)
V
AIN
< (ADCR + 0.5)
1023
1022
1021
SAR
3
2
1
0
CHAPTER 10 A/D CONVERTER
2048
1
User’s Manual U17446EJ5V0UD
1024
1
2048
AV
1024
3
REF
1024
2
2048
5
Input voltage/AV
1024
3
2043
2048
REF
1022
1024
2045
2048
1023
1024
2047
2048
ADCR
1
03FFH
03FEH
03FDH
0003H
0002H
0001H
0000H