Panasonic MN103S

Chapter 9
16-bit Timer
IX - 68 External Trigger
9.11 External Trigger
9.11.1 External Trigger Operation
External trigger is to activate timers by external input pins.
■ Setting External Trigger Operation
Timers can be activated with the external trigger by setting the TMTGE flag of the timer mode register (TMnMD)
to “1”. The TMAEG flag of the timer compare/capture A register sets whether timer is activated at the falling
edge, or it is activated at rising edge of the input pin. The flag is “0” at the rising edge and “1” at the falling edge.
■ Setting Input Pin
Table:9.11.1 shows the pins which can use the external trigger.
Table:9.11.1 Timer and Input Capture Input PIn
When pins are used as external trigger, the settings of the following registers are necessary.
Table:9.11.2 Setting Input PIn
TImer 8 Timer 9 Time 10 Timer 11 Timer 12 Timer 13
Input pin TM8AIO TM9AIO TM10AIO TM11IO0 - -
Port output mode register Port I/O control register
TM8AIO P3MD(P36M) P3DIR(P36D)
TM9AIO P4MD(P42M) P4DIR(P42D)
TM10AIO P4MD(P46M) P4DIR(P46D)
TM11IO0 P7MD(P72M) P7DIR(P72D)