No SCKO with TLC5971

Hi everybody,

I'm trying to develop a board with two cascading TLC5971. To do that I use a 8bit microcontroller from microchip.

the first driver work fine, LED are light, SDTO send the right data to the second driver BUT no clock on SCKO pin... so the LED are not light by the second driver...

Is their anything to set for buffering the clock out ?

my config :

BLANK = 0
DSPRPT = 1
TMGRST = 0
EXTGCK = 0
OUTTMG = 1

Thank in advance