R01UH0822EJ0100 Rev.1.00
Page 873 of 1041
Jul 31, 2019
RX13T Group
26. 12-Bit A/D Converter (S12ADF)
Table 26.13
Times for Conversion during Scanning (in Numbers of Cycles of ADCLK and PCLK)
Note 1. For t
D
, t
SPLSH
, t
DIAG
, t
CONV
, and t
ED
, see Figure 26.26 and Figure 26.27.
Note 2. This is the maximum time required from software writing or trigger input to A/D conversion start.
Note 3. The value is fixed to 0Fh (15 ADCLK) when the internal reference voltage is A/D-converted.
Figure 26.26
Scan Conversion Timing (Activated by Software or Synchronous Trigger)
Item
Symbol
Type/Conditions
Unit
Synchronous
Trigger (MTU)
Asynchronous
Trigger
Software
Trigger
Scan start
processing time
*
A/D conversion on
group under group
priority control.
The low-priority group is to
be stopped. (The priority
group is activated after
low-priority group B is
stopped due to an A/D
conversion source of the
priority group.)
t
D
3 PCLKB + 6 ADCLK
—
—
Cycle
The low-priority group is
not to be stopped.
(Activation by an A/D
conversion source of the
priority group.)
2 PCLKB + 4 ADCLK
—
—
A/D conversion
when self-diagnosis
is enabled
A/D conversion for self-
diagnosis is to be started.
2 PCLKB + 6 ADCLK
4 PCLKB+
6 ADCLK
6 ADCLK
Other than above
2 PCLKB + 4 ADCLK
2 PCLKB +
4 ADCLK
4 ADCLK
Channel-dedicated
sample-and-hold
processing time*
Sampling time
t
SPLSH
t
SH
The setting of ADSHCR.SSTSH[7:0] (initial value =
1Ah) × ADCLK
Wait time between sampling and A/D conversion
t
W
13 ADCLK
Disconnection detection assistance processing time
t
DIS
The setting of ADNDIS[3:0] (initial value = 00h) ×
ADCLK*
Self-diagnosis
conversion
processing time*
Sampling time
t
DIAG
t
SPL
The setting of ADSSTR0 (initial value = 0Dh) × ADCLK
Time for conversion by successive approximation
t
SAM
32 ADCLK
Normal A/D conversion is to be started after
completion of self-diagnosis conversion.
t
DED
2 ADCLK
A/D conversion for self-diagnosis is to be started
after completion of conversion for continuous scan
on the last channel specified.
t
DSD
2 ADCLK
A/D conversion
processing time*
Sampling time
t
CONV
t
SPL
The setting of ADSSTRn (n = 0 to 7, O)
(initial value = 0Dh) × ADCLK
Time for conversion by successive approximation
t
SAM
32 ADCLK
Channel-dedicated sample-and-hold end processing time
t
SHED
3 ADCLK
Scan end processing time*
t
ED
1 PCLKB + 3 ADCLK
t
DIAG
t
SCAN
t
CONV
t
ED
DIAG conversion
A/D conversion
End
processing
t
D
Software trigger
Synchronous trigger
Waiting
ADST bit
A/D converter
Sampling
t
SPLSH