r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 574

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
23.3
Figure 23.3
Figure 23.4
23.3.1
23.3.2
The analog inputs, AN0 to AN11, share pins P0_0 to P0_7 and P1_0 to P1_3.
When using the pins AN0 to AN11 as input, set the corresponding port direction bit to 0 (input mode).
After changing the A/D operating mode, the analog input pin must be selected again.
Figure 23.3 shows a Timing Diagram of A/D Conversion. Figure 23.4 shows the A/D Conversion Cycles (  AD
= fAD).
Conversion time
Items Common to Multiple Modes
(Minimum)
Note:
process
process
43 AD
Input/Output Pins
A/D Conversion Cycles
Start
Start
1. The conversion time (minimum) is 43 AD for 8-bit and 10-bit resolution.
Preliminary document
Specifications in this document are tentative and subject to change.
Timing Diagram of A/D Conversion
A/D Conversion Cycles (  AD = fAD)
(1)
Charging time
Open-circuit
Open-circuit
detection
detection
Start process
Start process
(Minimum)
1 AD
Conversion time for the 1st bit
Sampling time
15  AD cycles
Disabled: 0 AD
Enabled: 2 AD
Charging time
Open-circuit
Open-circuit
detection
detection
A/D conversion execution time
Comparison
A/D conversion execution time
Sampling time
Conversion time for the 1st bit
time
15 AD
Comparison
* Repeat until conversion ends
2nd bit
time
Comparison
Comparison
2.5 AD
time
time
••••••
the following bits
Conversion time
for the 2nd and
Comparison
2.5 AD
time
Comparison
time
End process
End process
process
process
End
End
2 AD
23. A/D Converter
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