R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 493

MCU 1KB FLASH 16K ROM 32-LQFP

R5F21334CNFP#U0

Manufacturer Part Number
R5F21334CNFP#U0
Description
MCU 1KB FLASH 16K ROM 32-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/33Cr
Datasheet

Specifications of R5F21334CNFP#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
27
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 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 463 of 589
27.2.6
Notes:
After Reset
1. When on-chip reference voltage is used as analog input, first set the ADEX0 bit to 1 (on-chip reference voltage
2. Do not set to 1 (A/D conversion using comparison reference voltage as input) in single sweep mode or repeat
3. When the ADSTBY bit is changed from 0 (A/D operation stops) to 1 (A/D operation enabled), wait for 1 φ AD cycle
4. To enable the A/D open-circuit detection assist function, select the conversion start state with the ADDDAEL bit
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 00D7h
selected) and then set the OCVREFAN bit in the OCVREFCR register 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).
sweep mode.
or more before starting A/D conversion.
after setting the ADDDAEN bit to 1 (enabled).
The conversion result with an open circuit varies with external circuits. Careful evaluation should be performed
according to the system before using this function.
If the ADCON1 register is rewritten during A/D conversion, the conversion result is undefined.
Symbol ADDDAEL ADDDAEN ADSTBY
ADDDAEN A/D open-circuit detection assist
ADDDAEL A/D open-circuit detection assist
ADSTBY A/D standby bit
Bit
Symbol
ADEX0
A/D Control Register 1 (ADCON1)
BITS
b7
0
Extended analog input pin select bit
Reserved bits
8/10-bit mode select bit
function enable bit
method select bit
b6
0
Bit Name
(3)
(4)
(4)
b5
0
BITS
b4
0
(1)
0: Extended analog input pin not selected
1: On-chip reference voltage selected
Set to 0.
0: 8-bit mode
1: 10-bit mode
0: A/D operation stops (standby)
1: A/D operation enabled
0: Disabled
1: Enabled
0: Discharge before conversion
1: Precharge before conversion
b3
0
b2
0
Function
b1
0
ADEX0
b0
0
(2)
27. A/D Converter
R/W
R/W
R/W
R/W
R/W
R/W
R/W

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