PI3HDMI336 Datasheet, PDF (9/22 Pages) Pericom Semiconductor Corporation – 3:1 ActiveEye HDMI Switch with I2C Control & ARC Transmitter

INT-Flag flowchart
Power
On Reset
INT-Flag = 0
INT-OUT= 0 (pin)
Any 5V-portA/B/C
from high to low or
from low to high
INT-Flag = 1
INT-OUT=1 (pin)
I²C read out
PI3HDMI336
3:1 ActiveEye™ HDMI™ Switch with
I²C Control & ARC Transmitter
INT-Flag =0 condition: after I²C read
out INT-Flag bit and Ack from master
is active.
I²C Bus transactions
Data transfers follow the format shown in Fig.1. After the START condition (S), a slave address is sent. This address is 7 bits long
followed by an eighth bit which is a data direction bit (R/W) - a ‘zero’ indicates a transmission (WRITE), a ‘one’ indicates a request
for data (READ). A data transfer is always terminated by a STOP condition (P) generated by the master. However, if a master still
wishes to communicate on the bus, it can generate a repeated START condition (Sr) and address another slave without first generat-
ing a STOP condition. Various combinations of read/write formats are then possible within such a transfer.
Figure 1: A complete data transfer
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www.pericom.com 07/28/2012