Fujitsu FR81S User Manual
CHAPTER 19: BASE TIMER
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: BASE TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
40
5.2. I/O Allocation
This section explains I/O allocation.
Set I/O of the base timer for the BTSEL01 register before using the timer. You can select one of the following
seven:
I/O mode 0
16-bit timer standard mode
The base timer operates separately for each channel in this mode.
I/O mode 1
32-bit timer full mode
The even-number channel signals of the base timer are allocated to the external pin in this mode.
I/O mode 2
External trigger sharing mode
The external activation trigger can be input to two channels of base timer at the same time in this mode. Using
this mode allows simultaneous activation of two channels of base timer.
I/O mode 4
Timer activation/stop mode
Activation/stop of the odd-number channel is controlled by the even-number channel in this mode. The
odd-number channel is started with the rising edge(*) of the output signal from the even-number channel and
stops with the falling edge(*).
I/O mode 5
Simultaneous software activation mode
More than one channels are started by the software at the same time in this mode.
I/O mode 6
Software activation timer activation/stop mode
Activation/stop of the odd-number channel is controlled by the even-number channel in this mode. The
even-number channel is started by the software. The odd-number channel is started with the rising edge(*) of
the output signal from the even-number channel and stops with the falling edge(*).
I/O mode 7
Timer activation mode
Activation of the odd-number channel is controlled by the even-number channel in this mode. The
odd-number channel is started with the rising edge(*) of the output signal from the even-number channel.
(*): Make a setting using the trigger input selection bit (BTxTMCR:EGS).
MB91520 Series
MN705-00010-1v0-E
673