Adc12A Ch.n Trigger/Analog Input Select Register - Epson S1C17M20 Technical Manual

Bit 10 BSYSTAT
This bit indicates whether the ADC12A is executing A/D conversion or not.
1 (R/W): A/D converting
0 (R/W): Idle
Bits 9–2 Reserved
Bit 1 ADST
This bit starts A/D conversion or enables to accept triggers.
1 (R/W): Start sampling and conversion (software trigger)/
Enable trigger acceptance (external trigger, 16-bit timer underflow trigger)
0 (R/W): Terminate conversion
This bit does not revert to 0 automatically after A/D conversion has completed. Write 0 to this bit once
and write 1 again to start another A/D conversion. After 0 is written to this bit to forcefully terminate
conversion, the ADC12A stops after the A/D conversion being executed is completed. Therefore, this
bit cannot be used to determine whether the ADC12A is executing A/D conversion or not.
Note: The data written to the ADC12_nCTL.ADST bit must be retained for one or more CLK_T16_k
clock cycles when 1 is written or two or more CLK_T16_k clock cycles when 0 is written.
Bit 0 MODEN
This bit enables the ADC12A operations.
1 (R/W): Enable ADC12A operations (The operating clock is supplied.)
0 (R/W): Disable ADC12A operations (The operating clock is stopped.)
Note: After 0 is written to the ADC12_nCTL.MODEN bit, the ADC12A executes a terminate
processing. Before the clock source is deactivated, read the ADC12_nCTL.MODEN bit to
make sure that it is set to 0.

ADC12A Ch.n Trigger/Analog Input Select Register

Register name Bit
ADC12_nTRG 15–14 –
13–11 ENDAIN[2:0]
10–8 STAAIN[2:0]
7
6
5–4 CNVTRG[1:0]
3
2–0 SMPCLK[2:0]
Note: Make sure that the ADC12_nCTL.BSYSTAT bit is set to 0 before altering the ADC12_nTRG register.
Bits 15–14 Reserved
Bits 13–11 ENDAIN[2:0]
These bits set the analog input pin to be A/D converted last.
See Table 19.6.1 for the relationship between analog input pins and bit setting values.
Note: The analog input pin range to perform A/D conversion must be set as ADC12_nTRG.
ENDAIN[2:0] bits ≥ ADC12_nTRG.STAAIN[2:0] bits.
Bits 10–8 STAAIN[2:0]
These bits set the analog input pin to be A/D converted first.
See Table 19.6.1 for the relationship between analog input pins and bit setting values.
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
Bit name Initial
0x0
0x0
0x0
STMD 0
CNVMD 0
0x0
– 0
0x7
Seiko Epson Corporation
19 12-BIT A/D CONVERTER (ADC12A)
Reset R/W
– R –
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
– R
H0 R/W
Remarks
19-7