Toshiba TLCS-900/H1 Series Manual page 312

(3) Starting AD conversion
To start AD conversion, write a 1 to ADMOD0<ADS> in AD mode control register "0"
or ADMOD2<ADTRGE> in AD mode control register 2, and input falling edge on
pin. When AD
ADTRG
ADMOD0<ADBF> will be set to 1, indicating that AD conversion is in progress.
During AD conversion, a falling edge input on the
(4) AD conversion modes and the AD conversion end interrupt
The four AD conversion modes are:
• Channel fixed single conversion mode
• Channel scan single conversion mode
• Channel fixed repeat conversion mode
• Channel scan repeat conversion mode
The ADMOD0<REPEAT> and ADMOD0<SCAN> settings in AD mode control
register 0 determine the AD mode setting.
Completion of AD conversion triggers an INTAD AD conversion end interrupt
request. Also, ADMOD0<EOCF> will be set to 1 to indicate that AD conversion has
been completed.
1. Channel fixed single conversion mode
Setting ADMOD0<REPEAT> and ADMOD0<SCAN> to 00 selects conversion
channel fixed single conversion mode.
In this mode, data on one specified channel is converted once only. When the
conversion has been completed, the ADMOD0<EOCF> flag is set to 1,
ADMOD0<ADBF> is cleared to 0, and an INTAD interrupt request is generated.
2. Channel scan single conversion mode
Setting ADMOD0<REPEAT> and ADMOD0<SCAN> to 01 selects conversion
channel scan single conversion mode.
In this mode, data on the specified scan channels is converted once only. When
scan conversion has been completed, ADMOD0<EOCF> is set to 1,
ADMOD0<ADBF> is cleared to 0, and an INTAD interrupt request is generated.
conversion starts,
92CH21-310
TMP92CH21
the AD conversion busy
pin will be ignored.
ADTRG
flag
2009-06-19