5. Pin Description
6
5
4
1
2
3
VSS
SSCLK2/SSONb/PD/
OE
SSCLK1/REFCLK
FSEL/SSONb/OE
VDD
XOUT
XIN/CLKIN
Si51214
Figure 5.1. 6-Pin TDFN
Table 5.1. Si51214 6-Pin Descriptions
Pin # Name Type Description
1 VDD PWR 1.8 V power supply.
2 XIN/CLKIN I External crystal and clock input.
3 XOUT O Crystal output. Leave this pin unconnected (floating) if an external
clock input is used.
4 SSCLK1/REFCLK/FSEL/SSONb/OE I/O Programmable SSCLK1 or REFCLK output or MultiFunction con-
trol input. The frequency at this pin is synthesized by the internal
PLL if programmed as SSCLK1 with or without spread. If pro-
grammed as REFCLK, the output clock is a buffered output of
crystal or reference clock input. If programmed as a MultiFunction
control input, it can be OE, FSEL, and SSONb.
5 SSCLK2/OE/SSONb/PD I/O Programmable SSCLK2 output or MultiFunction control input. The
frequency at this pin is synthesized by the internal PLL if program-
med as SSCLK2 with or without spread. SSCLK2 output can also
be programmed as a buffered output of crystal or reference clock
input divided by N, 2
< N < 8. If programmed as a MultiFunction
control input, it can be OE, PD, and SSONb. This pin cannot be
programmed as FSEL control input.
6 VSS GND Ground.
Si51214 Data Sheet
Pin Description
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