Chapter 4 Clock Sources; Mainosc; Programmable Oscillator - Renesas RH850/E2 Series User Manual

Piggyback board

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Chapter 4 Clock sources

4.1.1

4.1.2

R20UT4084ED0130 Rev. 1.3

2020-05-12

External crystal oscillators for the device clock supply are provided with the

board.

A crystal or ceramic resonator can be mounted on socket X1.

A 20MHz and a 40MHz oscillator are supplied with the board.

The signals X1 and X2 are by default not connected to a pin header in order to

minimize disturbance on the resonator signal. If needed the signals can be

connected to CN5 (pins #24 and 26) via connecting with 0Ohm resistances R48

and R49. For details, please refer to Chapter 11 'Schematic'.

It is possible to mount a programmable crystal oscillator on the PiggyBack board

at OSC1. The available footprint and circuitry is designed for a SG-8002CE

programmable crystal oscillator from Epson Toyocom. The output from this

oscillator can be connected to port X1 via resistor R38. The SG-8002CE is

neither mounted nor provided with the board. For details about the available

circuitry, refer to Chapter 11 'Schematic'. A resonator mounted on socket X1

must not be used in parallel to another clock source.

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