Rev. 1.40
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Rev. 1.40
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BS67F340/BS67F350/BS67F360/BS67F370
Enhanced Touch A/D Flash MCU with LCD Driver
BS67F340/BS67F350/BS67F360/BS67F370
Enhanced Touch A/D Flash MCU with LCD Driver
Single Pulse Output Mode
To select this mode, bits STM1 and STM0 in the STMC1 register should be set to 10 respectively
and also the STIO1 and STIO0 bits should be set to 11 respectively. The Single Pulse Output Mode,
as the name suggests, will generate a single shot pulse on the STM output pin.
The trigger for the pulse output leading edge is a low to high transition of the STON bit, which can
be implemented using the application program. However in the Single Pulse Mode, the STON bit
can also be made to automatically change from low to high using the external STCK pin, which will
in turn initiate the Single Pulse output. When the STON bit transitions to a high level, the counter
will start running and the pulse leading edge will be generated. The STON bit should remain high
when the pulse is in its active state. The generated pulse trailing edge will be generated when the
STON bit is cleared to zero, which can be implemented using the application program or when a
compare match occurs from Comparator A.
However a compare match from Comparator A will also automatically clear the STON bit and thus
generate the Single Pulse output trailing edge. In this way the CCRA value can be used to control the
pulse width. A compare match from Comparator A will also generate a STM interrupt. The counter
can only be reset back to zero when the STON bit changes from low to high when the counter
restarts. In the Single Pulse Mode CCRP is not used. The STCCLR and STDPX bits are not used in
this Mode.
STON bit
0
à
1
S
/
W Co��and
SET
“
STON
”
o�
STCK Pin
T�ansition
STON bit
1
à
0
CCRA
T�ailing Edge
S
/
W Co��and
CLR
“
STON
”
o�
CCRA Co�pa�e
Mat�h
STP Output Pin
Pulse Width = CCRA Value
CCRA
Leading Edge
Single Pulse Generation