IS31FL3199
Integrated Silicon Solution, Inc. — www.issi.com
Rev. B, 12/25/2013
13
CASCADE FOR SYNCHRONIZATION OF CHIPS
Operating in the cascade mode can make two chips
synchronize. By setting the CM bit of Configuration
Register 2 (04h) to “0”, IS31FL3199 operates as a
master. There are two pins (CLK, I_AUD) for
synchronization of chips. CLK pin can synchronize the
breathing and I_AUD pin can synchronize the audio
current.
SHUTDOWN MODE
Shutdown mode can either be used as a means of
reducing power consumption or generating a flashing
display (repeatedly entering and leaving shutdown
mode). During shutdown mode all registers retain their
data.
SOFTWARE SHUTDOWN
By setting SSD bit of the Shutdown Register (00h) to
“0”, the IS31FL3199 will operate in software shutdown
mode, wherein they consume only 2μA (typ.) current.
When the IS31FL3199 is in software shutdown mode,
all current sources are switched off.
HARDWARE SHUTDOWN
The chip enters hardware shutdown mode when the
SDB pin is pulled low, wherein they consume only 1μA
(typ.) current.
