NEC PD754144 User Manual page 129

Figure 6-27. Format of Timer Counter Mode Register (Channel 1) (2/2)
Timer start command bit
Clears counter and IRQT1 flag when "1" is written. Starts count operation
TM13
if bit 2 is set to "1".
Operation mode
TM12
0 Stops (count value retained)
1 Count operation
Operation mode select bit
TM11 TM10
0
1
Other
Note This mode is used as a carrier generator mode when used in
combination with TM20, TM21 (=11) of timer counter mode
register (channel 2).
Caution After a reset, all bits of TM1 become "0", therefore when operating the timer it is necessary to
set the count pulse value first. Moreover, when any setting prohibited value is set, the count pulse
set becomes 0 and TM0 does not operate as a timer.
CHAPTER 6 PERIPHERAL HARDWARE FUNCTION
Count operation
0 8-bit timer counter mode
0 16-bit timer counter mode
Setting prohibited
User's Manual U10676EJ3V0UM
Mode
Note
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