R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 495

• 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 466 of 573
27.10 Notes on A/D Converter
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Write to the ADMOD register, the ADINSEL register, the ADCON0 register (other than ADST bit), the
ADCON1 register, the OCVREFCR register when A/D conversion is stopped (before a trigger occurs).
To use the A/D converter in repeat mode 0, repeat mode 1, or repeat sweep mode, select the frequency of the A/D
converter operating clock φAD or more for the CPU clock during A/D conversion.
Do not select fOCO-F as φAD.
Connect 0.1 µF capacitor between the VREF pin and AVSS pin.
Do not enter stop mode during A/D conversion.
Do not enter wait mode during A/D conversion regardless of the state of the CM02 bit in the CM0 register (1:
Peripheral function clock stops in wait mode or 0: Peripheral function clock does not stop in wait mode).
Do not set the FMSTP bit in the FMR0 register to 1 (flash memory stops) or the FMR27 bit to 1 (low-current-
consumption read mode enabled) during A/D conversion. Otherwise, the A/D conversion result will be
undefined.
Do not change the CKS2 bit in the ADMOD register while fOCO-F is stopped.
During an A/D conversion operation, if the ADST bit in the ADCON0 register is set to 0 (A/D conversion stops)
by a program to forcibly terminate A/D conversion, the conversion result of the A/D converter is undefined and
no interrupt is generated. The value of the ADi register before A/D conversion may also be undefined.
If the ADST bit is set to 0 by a program, do not use the value of all the ADi register.
27. A/D Converter