need translate 3 words

[qrp.fr]

Hello every body

in the schematic of K2 ( control board ) there is the signal
 "DAC2CS"    ???
 " SDO "         ???
 " SCK "          signal clock ?

Many thanks

bruno, F5NGZ, 73's

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[KK7P]

> in the schematic of K2 ( control board ) there is the signal
>  "DAC2CS"    ???

DAC2 chip select: this is the signal that lets the PIC processor on the
control board load values to U5 on the RF board, a digital-to-analog
converter (DAC) which is used to change the frequency of the PLL
reference oscillator.

>  " SDO "         ???

Serial data out: this is used to send the actual data to the DAC, or to
other chips connected to the serial peripheral interface (SPI) bus.

>  " SCK "          signal clock ?

Serial clock: part of the SPI bus, this tells the chip when to accept a
data bit on the SDO line.

73,

Lyle KK7P

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