BU9883FV-W_1 Datasheet, PDF (16/19 Pages) Rohm – I2C BUS3Ports for HDMI Port Serial EEPROM

BU9883FV-W
●I²C BUS input / output circuit
○Input (SCL0～3)
Fig.58 Input pin circuit diagram
○Input / output (SDA0～3)
Technical Note
○Input (WPB)
Fig.59 Input / output pin circuit diagram
Fig.60 Input pin circuit diagram
●Notes on power ON
At power on, in IC internal circuit and set, VCC rises through unstable low voltage area, and IC inside is not completely reset,
and malfunction may occur. To prevent this, functions of POR circuit and LVCC circuit are equipped. To assure the action,
observe the following conditions at power on.
1. Set SDA0～3 = 'H' and SCL0～3 ='L' or 'H'
2. Start power source so as to satisfy the recommended conditions of t_R, t_OFF, and Vbot for operating POR circuit.
tR
VCC
tOFF
Vbot
0
Fig.60 Rise waveform diagram
Recommended conditions of t_R, t_OFF,Vbot
t_R
t_OFF
Vbot
10ms or below 10ms or longer 0.3V or below
100ms or below 10ms or longer 0.2V or below
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2009.04 - Rev.B