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RL78/G1A CHAPTER 9 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER
9.3.2 Registers controlling port functions of pins to be used for clock or buzzer output
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Using a port pin for clock or buzzer output requires setting of the registers that control the port functions multiplexed on
the target pin (port mode register (PMxx), port register (Pxx)). For details, see 4.3.1 Port mode registers (PMxx) and
4.3.2 Port registers (Pxx).
Specifically, using a port pin with a multiplexed clock or buzzer output function (e.g. P140/INTP6/PCLBUZ0,
P141/INTP7/PCLBUZ1) for clock or buzzer output, requires setting the corresponding bits in the port mode register (PMxx)
and port register (Pxx) to 0.
Example: When P140/INTP6/PCLBUZ0 is to be used for clock or buzzer output
Set the PM140 bit of port mode register 14 to 0.
Set the P140 bit of port register 14 to 0.
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Jul 04, 2013