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24 a/D COnVeRTeR (aDC10)
When ADMS is 0, the A/D converter operates in one-time conversion mode. In this mode, A/D conver-
sion is terminated after all inputs in the range of the channels selected by ADCS[2:0] and ADCE[2:0]
have been converted once.
D[5:4]
aDTS[1:0]: Conversion Trigger Select Bits
Selects a trigger source to start A/D conversion.
When an external trigger is used, the #ADTRG pin must be configured in advance using the port func-
tion select bit (see the "I/O Ports (P)" chapter). A/D conversion is started when a falling edge of the
#ADTRG signal is detected.
When 16-bit timer (T16) Ch.0 is used, since its underflow signal serves as a trigger, set the underflow
cycle and other conditions for the timer.
D3
Reserved
D[2:0]
aDST[2:0]: Sampling Time Setting Bits
Sets the analog input sampling time.
a/D Control/Status Register (aDC10_CTl)
Register name address
Bit
a/D Control/
0x5384
D15
Status Register
(16 bits)
D14–12 aDiCh[2:0] Conversion channel indicator
(aDC10_CTl)
D11
D10
D9
D8
D7–6 –
D5
D4
D3–2 –
D1
D0
D15
Reserved
D[14:12] aDiCh[2:0]: Conversion Channel indicator Bits
Indicates the channel number (0 to 7) currently being A/D-converted. (Default: 0x0 = AIN0)
When A/D conversion is performed in multiple channels, read this bit to identify the channel in which
conversion is underway.
D11
Reserved
24-10
Table 24.
6.3 Trigger Selection
aDTS[1:0]
0x3
0x2
0x1
0x0
Table 24.
6.4 Sampling Time Settings
aDST[2:0]
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
name
Function
–
reserved
–
reserved
aDiBS
ADC10 status
aDOWe
Overwrite error flag
aDCF
Conversion completion flag
reserved
aDOie
Overwrite error interrupt enable
aDCie
Conversion completion int. enable 1 Enable
reserved
aDCTl
A/D conversion control
aDen
ADC10 enable
Seiko epson Corporation
Trigger source
External trigger (#ADTRG)
Reserved
16-bit timer Ch.0
Software trigger
(Default: 0x0)
Sampling time
(in a/D conversion clock cycles)
9 cycles
8 cycles
7 cycles
6 cycles
5 cycles
4 cycles
3 cycles
2 cycles
(Default: 0x7)
Setting
–
0x0 to 0x7
–
1 Busy
0 Idle
1 Error
0 Normal
1 Completed
0 Run/Stand-
by
–
1 Enable
0 Disable
0 Disable
–
1 Start
0 Stop
1 Enable
0 Disable
S1C17624/604/622/602/621 TeChniCal Manual
init. R/W
Remarks
–
–
0 when being read.
0x0
R
–
–
0 when being read.
0
R
0
R/W Reset by writing 1.
0
R
Reset when ADC10_
ADD is read.
–
–
0 when being read.
0
R/W
0
R/W
–
–
0 when being read.
0
R/W
0
R/W
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