r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 619

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
28.3
Figure 28.2
Figure 28.3
28.3.1
28.3.2
Conversion time
The analog input shares pins P0_0 to P0_7, and P1_0 to P1_3 in AN0 to AN11.
When using the ANi (i = 0 to 11) pin as input, set the corresponding port direction bit to 0 (input mode).
After changing the A/D operating mode, select an analog input pin again.
Figure 28.2 shows a Timing Diagram of A/D Conversion. Figure 28.3 shows the A/D Conversion Cycles ( φ AD
= fAD).
Start process
(Minimum)
Note:
process
Common Items for Multiple Modes
44 φAD
Start
1. The conversion time (minimum) is 44 φAD for 8-bit and 10-bit resolution.
Input/Output Pins
A/D Conversion Cycles
Timing Diagram of A/D Conversion
(1)
A/D Conversion Cycles ( φ AD = fAD)
Charging time
Open-circuit
Open-circuit
detection
detection
Start process
Start process
(Minimum)
1 φAD
Sampling time
16 φAD cycles
Conversion time of 1st bit
Disabled: 0 φAD
Enabled: 2 φAD
Charging time
Open-circuit
Open-circuit
detection
detection
A/D conversion execution time
Comparison
time
Sampling time
A/D conversion execution time
Conversion time at the 1st bit
16 φAD
Comparison
* Repeat until conversion ends
2nd bit
time
Comparison
Comparison
time
2.5 φAD
time
……
at the 2nd bit and
Conversion time
Comparison
the follows
2.5 φAD
Comparison
time
time
28. A/D Converter
End process
End process
End process
End process
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2 φAD