Renesas rl78 User Manual

RL78/G1A

CHAPTER 5 CLOCK GENERATOR

R01UH0305EJ0200 Rev.2.00

178

Jul 04, 2013

5.7 Resonator and Oscillator Constants

The resonators for which the operation is verified and their oscillator constants are shown below.

Cautions 1. The oscillator constants shown above are reference values based on evaluation in a specific

environment by the resonator manufacturer. Be sure to apply to the resonator manufacturer for

evaluation on the actual circuit before using these constants for your application.

Also apply to the resonator manufacturer for re-evaluation on the actual circuit if you have changed

the make of the microcontroller or the board.

2. The oscillation voltage and oscillation frequency only indicate the oscillator characteristic. Use the

RL78 microcontroller so that the internal operation conditions are within the specifications of the

DC and AC characteristics.

Figure 5-16. External Oscillation Circuit Example

(a) X1 oscillation

(b) XT1 oscillation

XT1

XT2

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