turn off mute so that the outputs will never mute, set the jumper to tie MUTE to GND. For normal operation, set th
jumper to tie CD
¯¯¯ to MUTE for automatic mute control. The MUTE pin has an internal pulldown (to disable mute),
so JP2 may be left unconnected and the device will never mute.
e
BYPASS (JP3)
ol of the equalization BYPASS function. To put the device into bypass mode, set the jumper to pull
AUTO SLEEP (JP4)
he AUTO SLEEP function. To put the device into auto sleep mode in which it will power
t
SPI Header (JP1)
eripheral Interface) header. It allows access to the SPI pins ( SS
¯¯¯ , MISO, MOSI, and SCK)
Carrier Detect LED (D1)
ct. This LED is GREEN when an input signal has been detected, and OFF
JP3 allows contr
BYPASS to VCC. To turn off bypass (for normal operation) set the jumper to pull BYPASS to GND. The BYPASS
pin has an internal pulldown (to disable bypass), so JP2 may be left unconnected for normal operation.
JP4 allows control of t
down when no input is detected, set the jumper to pull AUTO SLEEP to VCC. To turn off auto sleep and preven
the LMH0394 from automatically powering down, set the jumper to pull AUTO SLEEP to GND. The AUTO SLEEP
pin has an internal pullup (to enable auto sleep), so JP4 may be left unconnected to enable auto sleep mode.
JP1 is the SPI (Serial P
while the LMH0394 is in SPI mode. These pins may be connected to a standard SPI controller to access the
LMH0394 SPI registers. Refer to the LMH0394 datasheet for details.
D1 shows the status of Carrier Dete
when no input is detected. D1 shows the status of Carrier Detect while in Pin Mode or SPI Mode.
SD394 EVK User Guide
3 of 8
Rev 1.2
© 2010, National Semiconductor Corp.
