R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 258

• Manufacturer Part Number: R5F211B1SP#U0
• Description: IC R8C MCU FLASH 4K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/1Br

Specifications of R5F211B1SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
17.3
Figure 17.6
17.4
Figure 17.7
When the SMP bit in the ADCON2 register is set to 1 (sample and hold function enabled), the A/D conversion rate
per pin increases to 28φAD cycles for 8-bit resolution or 33φAD cycles for 10-bit resolution. The sample and hold
function is available in all operating modes. Start A/D conversion after selecting whether the sample and hold
circuit is to be used or not.
When performing A/D conversion, charge the comparator capacitor in the MCU during the sampling time.
Figure 17.6 shows a Timing Diagram of A/D Conversion.
Figure 17.7 shows the A/D Conversion Cycles.
Without sample and hold
Without sample and hold
With sample and hold
With sample and hold
Sample and Hold
Sample and Hold
Sample and Hold
A/D Conversion Cycles
Dec 08, 2006
A/D Conversion Mode
disabled
enabled
Timing Diagram of A/D Conversion
A/D Conversion Cycles
Page 240 of 315
Sampling time
Sampling time
4ø AD cycles
4ø AD cycles
10 bits
10 bits
Conversion time of 1st bit
Conversion time of 1st bit
8 bits
8 bits
Conversion
49φAD
59φAD
28φAD
33φAD
Time
Comparison
Comparison
time
time
Conversion time of 1st bit
Sampling
4φAD
4φAD
4φAD
4φAD
Time
2.5ø AD cycles
Sampling time
Comparison
2nd bit
time
Comparison
2.0φAD
2.0φAD
2.5φAD
2.5φAD
Time
* Repeat until conversion ends
2nd bit
Comparison
Comparison
time
time
Sampling
Conversion time 2nd and
0.0φAD
0.0φAD
2.5φAD
2.5φAD
Time
following bits
2.5ø AD cycles
* Repeat until conversion ends
Sampling time
Comparison
time
Comparison
2.5φAD
2.5φAD
2.5φAD
2.5φAD
Time
Comparison
time
17. A/D Converter
Processing
processing
8.0φAD
8.0φAD
4.0φAD
4.0φAD
End of
End