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15
15-18
Rev.1.0
15.2.8 DACNT Counter
■
DACNT Counter (DACNT)
<Address: H'0080 1808>
The DACNT Counter is an 8-bit down-counter which after being enabled, starts counting down from
its set value synchronously with the count clock generated by the PRSA. The value of the DACNT
Counter comprises the D-A converter's parameter table address value.
When the DACNT Counter underflows after reaching the minimum count (DACNT = H'00), it is
reloaded with the content of the DACNT Reload Register and restarts counting down from the
newly set value.
The diagram below shows operation of the DACNT Counter when the DACNT Counter and the
DACNT Reload Register respectively have the values H'A0 and H'B0 set as their initial values.
D0
1
2
3
4
5
6
D7
DACNT
<When reset: H'0000>
D
Bit Name
Function
R
W
0-7
DACNT
8-bit counter value
Figure 15.2.7 Example of DACNT Counter Operation
PD MODULE
15.2 PD Module Related Registers
Count clock
Enable bit
H'FF
H'00
DACNT Reload
Register (DACNT)
Counter
H'B0
H'A0
DACNT Reload
Register set value
The counter counts down
from the set value of the DACNT
Reload Register
The counter counts
down from its set value
Enabled
Summary of Contents for 32172
Page 20: ... This is a blank page 16 ...
Page 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Page 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Page 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Page 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Page 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Page 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Page 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Page 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Page 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Page 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...