R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 388

• Manufacturer Part Number: R5F2121AJFP#U0
• Description: MCU FLASH 96K 5K CMOS 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F2121AJFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/20 Group, R8C/21 Group
Rev.2.00 Aug 27, 2008
REJ09B0250-0200
18.3
Figure 18.8
When the SMP bit in the ADCON2 register is set to 1 (with sample and hold function), A/D conversion rate per pin
increases. The sample and hold function is available in all operating modes. Start the A/D conversion after
selecting whether the sample and hold circuit is to be used or not.
Figure 18.8 shows the Timing Diagram of A/D Conversion.
Sample & hold
Sample & hold
Sample and Hold
disabled
enabled
Timing Diagram of A/D Conversion
Page 370 of 458
Conversion time at the 1st bit
Sampling time
Conversion time at the 1st bit
Sampling time
4ø AD cycle
4ø AD cycle
Comparison
Comparison
time
time
at the 2nd bit
Sampling time
2.5ø AD cycle
Comparison
time
at the 2nd bit
* Repeat until conversion ends
Comparison
Comparison
time
time
* Repeat until conversion ends
Sampling time
2.5ø AD cycle
Comparison
time
Comparison
time
18. A/D Converter