Appendix 4
Appendix
4-16
32180 Group User's Manual (Rev. 1.0)
SUMMARY OF PRECAUTIONS
Appendix 4.9 Precautions about the A-D Converters
Table 4.9.1 Sampling Time (in Which C2 Needs to Be Charged)
Conversion start method
Conversion speed
Sampling time for the first bit Sampling time for the second and subsequent bits
Single mode
Slow mode
Normal speed
27.5BCLK
13.5BCLK
(when sample-and
Double speed
15.5BCLK
7.5BCLK
-hold disabled)
Fast mode Normal speed
11.5BCLK
5.5BCLK
Double speed
7.5BCLK
3.5BCLK
Single mode
Slow mode Normal speed
27.5BCLK
–
(when sample-and
Double speed
15.5BCLK
–
-hold enabled)
Fast mode Normal speed
11.5BCLK
–
Double speed
7.5BCLK
–
Comparator mode
Slow mode Normal speed
27.5BCLK
–
Double speed
15.5BCLK
–
Fast mode
Normal speed
11.5BCLK
–
Double speed
7.5BCLK
–
Therefore, the time in which C2 needs to be charged is found from Eq. B-1, as follows:
Sampling time (in which C2 needs to be charged) > Cin
×
R1 + C2(R1 + R2) --- Eq. B2
Thus, the maximum value of R1 can be obtained as a criterion from the equation below. Note, however, that
for single mode (when sample-and-hold is disabled), the sampling time for the second and subsequent bits
(C2 charging time) must be applied.
C2 charging time - C2
×
R2
R1 <
Cin + C2
Содержание M32R/ECU Series
Страница 17: ...12 This page is blank for reasons of layout...
Страница 18: ...CHAPTER 1 OVERVIEW 1 1 Outline of the 32180 Group 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Assignments...
Страница 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Страница 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Страница 795: ...22 22 2 32180 Group User s Manual Rev 1 0 TYPICAL CHARACTERISTICS To be written at a later time...
Страница 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Страница 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Страница 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...