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RL78/G24 Fast Prototyping Board
5.9
Clock
Clock circuits are provided to handle the clock sources for the evaluation MCU. For details on the
specifications of the evaluation MCU clocks, refer to the RL78/G24 User's Manual: Hardware. For details on
the clock circuit of this product, refer to the circuit schematics of the RL78/G24 Fast Prototyping Board. Table
5-10 shows the details of the clocks on the RL78/G24 Fast Prototyping Board.
Table 5-10 Details of Clocks
Clock
OSC1*
Crystal oscillator for the main system
clock
(e.g. CSTNE20M0V5 from Murata
Manufacturing Co., Ltd.)
OSC2*
Crystal oscillator or ceramic resonator for
the main system clock
OSC3
Crystal oscillator for the sub-clock
Note: Use the main system clock by cutting the patterns for cutting [P121] and [P122] and short-circuiting the short-
circuit pads [X1] and [X2].
5.10
Reset Switch
Pressing the reset switch (RST) applies a hardware reset to the evaluation MCU.
5.11
User Switch
An optional user switch (SW) is mounted. It is connected to pin 9 of the evaluation MCU, which operates as
pin function P137. The INTP0 interrupt is multiplexed on the same pin.
R20UT5091EJ0100 Rev. 1.00
Apr.16.23
Function and Usage
State as
Frequency
Shipped
Not mounted
n/a
Not mounted
n/a
Mounted
32.768 kHz
5. User Circuits
Package for the
Oscillator
SMT
Lead type
SMT
Page 19 of 36
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