Sensor Connection; Oscillators; Description Of Jumper J - Renesas RL78/I1D User Manual

DETECT-IT RL78/I1D detector boards kit
5.4.1

Sensor connection

Please be careful when connecting the IR LED and IR photodiode.
Table Description of sensor connector of Smoke detector
Sensor Connector & pins
IR J10 – pins 7 & 8
photodiode
receive
IR LED J11 – pins 1 & 2
transmit
5.4.2

Oscillators

Each board is equipped with 2 oscillators:
• A 20 MHz oscillator
 The 20 MHz oscillator is sold onto each board and connected to the MCU. But it is not used by the application.
 Instead the internal High Speed on-chip oscillator of the RL7/I1D is used by each application. So pin P121/X1
and pin P122/X2 are used as Input.
• Please change the settings if you wish to use the external oscillator.
• A 32,768kHz quartz
 It is connected to the MCU
 It is operating and used by the application (especially by the RTC).
5.4.3

Description of Jumper J

Table Description of jumper of Smoke detector
UM-YDETECT-IT-RL78 V1.30
Figure Smoke detector components bottom view
Function
Connection of IR photodiode : Cathode K on pin 8 (J10-pin8), Anode
A on pin 7 (J10-pin7)
Connection of IR LED : Cathode K on pin 1 (J11-pin 1), Anode A on
pin 2 (J11-pin 2)
Kit User Manual
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