Toshiba H1 Series - Manual (Page 611)

TMP92CZ26A
92CZ26A-608
3.23.2.4 AD Conversion Modes and AD Conversion-End Interrupts
The ADC supports the following four conversion modes. For a normal AD conversion,
ADMOD0<1:0> select one of the four conversion modes. For a high-priority AD
conversion, the ADC only supports Channel Fixed Single Conversion mode.
a. Channel Fixed Single Conversion mode
b. Channel Scan Single Conversion mode
c. Channel Fixed Repeat Conversion mode
d. Channel Scan Repeat Conversion mode
(1) Normal AD conversion
ADMOD0 select the conversion mode. Once a conversion is
started, the ADMOD0 is set to “1”. The ADC generates the AD Conversion
End interrupt (INTAD) and sets the ADMOD0 to “1” at the end of the specified
conversion process.
a. Channel Fixed Single Conversion mode
This mode is selected by programming ADMOD0 to “00”.
In this mode, the ADC performs a single conversion on a single selected
channel. When a conversion is completed, the ADC sets the ADMOD0,
and generates the INTAD interrupt. ADMOD0 is cleared to “0” when it is
read.
b. Channel Scan Single Conversion mode
This mode is selected by programming ADMOD0 to “01”. In
this mode, the ADC performs a single conversion on each of a selected group of
channels. When a single conversion sequence is completed, ADMOD0 is
set to “1”, and generates the INTAD interrupt. ADMOD0 is cleared to “0”
by reading this bit only.
c. Channel Fixed Repeat Conversion mode
This mode is selected by programming ADMOD0 to “10”. In
this mode, the ADC repeatedly converts a single selected channel. When a
conversion process is completed, ADMOD0 is set to “1”.
ADMOD1 control INTAD interrupts generation in this mode. The
timing when ADMOD0 is set also depends on the ADMOD1. The
EOCF bit is cleared when it is read. ADMOD0 is cleared to “0” by reading
this bit only.
If ADMOD1 is set to “0”, the ADC generates an interrupt after each
conversion. The results of conversion are always stored in the ADREGxH/L
register. The ADMOD0 is set to “1” when the ADC stores the results to the
ADREGxH/L.