BU9929FV Datasheet, PDF (10/12 Pages) Rohm – I2C BUS interface, general purpose I/O ports with condition watching function

Multimedia ICs
BU9929FV
3）INT pin specification
When condition watching mode, INT output pin works for reporting of detection of watching port.
(a) When command D6=0(including default time after RESET release)
INT pin falls when detection of watching port is received. And INT pin rises after ACK-output which is on the I²C Data
read.
Watching Ports
F8
CLK
Output for I²C BUS
INT OUTPUT
St
SLAVE ADDRESS
A OUTPUT "F8"
In the case that there is a change in detection ports once, and there are another changes before returning the ACK (as
shown “A term”), then watching data is saved. And the output data in this case will be “AND” output of every bits of the
watching data.
Watching Ports
Output for I²C BUS
CLK
F6
C7
A4
" A term"
St
SLAVE ADDRESS
R A OUTPUT "84"
OUTPUT "84hex data" which
is the result of AND data
for "F6", "C7" and " A4".
INT OUTPUT
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