Fujitsu FR81S Manuale Utente
CHAPTER 44: 12-BIT A/D CONVERTER
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: 12-BIT A/D CONVERTER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
108
5.4.1. Operation Timing
The operation timing is shown.
Figure 5-23 12-bit A/D Converter Operation Timing
A/D activation request
AD status
Conversion completion
signal
Sampling time (which can be set by
ADMD:ST[1:0])
Conversion stop
Conversion stop
Compare time (which can be set by
ADMD:CT[1:0])
A/D data register(ADTCD)
Old conversion data
New conversion data
Conversion data
Conversion data signal
①
②
③
④
④
⑤
⑥
(1) With the specified activation factor, the A/D conversion is started.
(2) After the activation request of (1) is received, the sampling operation is started.
(3) After the sampling time specified with ADMD.ST[1:0] passes, the compare operation is started.
(4) After the compare time specified with ADMD.CT[1:0] passes, the conversion completion signal rising,
and the conversion is completed.
(5) A/D conversion data is output.
(6) New conversion data is stored in the A/D data register (ADTCD).
MB91520 Series
MN705-00010-1v0-E
1911