Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 25 Successive Approximation Type A/D Converter
FEUL620Q504 25-7
25.2.4 SA-ADC Control Register1 (SADCON1)
Address: 0F841H
Access: R/W
Access size: 8 bits
Initial value: 00H
7 6 5 4 3 2 1 0
SADCON1 – – – – – – – SARUN
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
SADCON is a special function register (SFR) used to control the operation of the SA-ADC.
Description of Bits
•
SARUN (bit 0)
This bit is used to start or stop the SA-ADC conversion. Set this bit to "1" to start the A/D conversion,
and "0" to stop it.
When SALP is “0” and then A/D conversion on the channel with the largest channel number among the
selected ones is terminated, the SARUN bit is automatically set to “0”. In the case of a trigger mode, the
control by the software isn’t possible. This bit is set to “1” when the A/D conversion starts by the trigger
event, and when conversion is finished, it becomes “0”.
In addition, don’t start A/D conversion in a state with all bits of SA-ADC enable register (SADEN) as
“0”. If the A/D conversion is started in this state, the A/D conversion circuit does not work.
SARUN Description
0 Stops conversion (initial value)
1 Starts conversion