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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 9 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER<br />

CHAPTER 9 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER<br />

9.1 Functions of Clock Output/Buzzer Output Controller<br />

The clock output controller is intended for carrier output during remote controlled transmission and clock output for<br />

supply to peripheral ICs.<br />

Buzzer output is a function to output a square wave of buzzer frequency.<br />

One pin can be used to output a clock or buzzer sound.<br />

The PCL pin outputs a clock selected by clock output select register 0 (CKS0).<br />

Figure 9-1 shows the block diagram of clock output/buzzer output controller.<br />

Caution In the low-consumption RTC mode (when the RTCLPC bit of the operation speed mode control<br />

register (OSMC) = 1), it is not possible to output the subsystem clock (fSUB) from the PCL pin.<br />

R01UH0317EJ0004 Rev. 0.04 489<br />

Feb. 22, 2013

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