UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 175
UPD78F9221CS-CAC-A
Manufacturer Part Number
UPD78F9221CS-CAC-A
Description
MCU 8BIT 2KB FLASH 20PIN
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9221MC-5A4-A.pdf
(418 pages)
Specifications of UPD78F9221CS-CAC-A
Core Processor
78K0S
Core Size
8-Bit
Speed
10MHz
Connectivity
LIN, UART/USART
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
15
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Ram Size
128 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
-
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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.
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 U16898EJ6V0UD
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
173
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