Datasheet

RL78/L12 CHAPTER 5 CLOCK GENERATOR

R01UH0330EJ0200 Rev.2.00 168

Dec 13, 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 constants for these oscillator circuits are reference values based on specific environments set

up for evaluation by the manufacturers. For actual applications, request evaluation by the

manufacturer of the oscillator circuit mounted on a board. Furthermore, if you are switching from a

different product to this microcontroller, and whenever you change the board, again request

evaluation by the manufacturer of the oscillator circuit mounted on the new 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

X2X1

(b) XT1 oscillation

XT1XT2

<R>