R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 474

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 445 of 573
27.2
27.2.1
Note:
After Reset
1. When on-chip reference voltage is used as analog input, first set the ADEX0 bit in the ADCON1 register to 1 (on-
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0026h
chip reference voltage selected) and then set the OCVREFAN bit to 1 (on-chip reference voltage and analog
input are connected).
When on-chip reference voltage is not used as analog input, first set the OCVREFAN bit to 0 (on-chip reference
voltage and analog input are cut off) and then set the ADEX0 bit to 0 (extended analog input pin not selected).
Set the PRC3 bit in the PRCR register to 1 (write enabled) before rewriting the OCVREFCR register.
If the contents of the OCVREFCR register are rewritten during A/D conversion, the conversion result is
undefined.
Symbol
Registers
OCVREFAN On-chip reference voltage to
Bit
Symbol
On-Chip Reference Voltage Control Register (OCVREFCR)
—
—
—
—
—
—
—
b7
—
0
analog input connect bit
Reserved bits
b6
—
0
Bit Name
b5
—
0
(1)
b4
—
0
0: On-chip reference voltage and analog input are cut off
1: On-chip reference voltage and analog input are
Set to 0.
connected
b3
—
0
b2
—
0
Function
b1
—
0
OCVREFAN
b0
0
27. A/D Converter
R/W
R/W
R/W