PIN DESCRIPTIONS (continued)
NUMBER
SYMBOL
CLK_EN
COSC
TYPE
DESCRIPTION
Clock enable. When HIGH, the serial clock outputs are enabled.
Timing control capacitor for internal system clock.
36
38
I
I
39
LOCK
O
Lock indication. When HIGH, the GS7025 is locked. LOCK is an open collector output
and requires an external 10kΩ pullup resistor.
40
41
42
43
SSI/CD
A/D
O
I
Signal strength indicator/Carrier detect.
Analog/Digital select.
MOD
I
270 Mb/s modulus select - Always set high.
OEM_TEST
O
Output ‘Eye’ monitor test. Single-ended current mode output that requires an external
50Ω pullup resistor. This feature is recommended for debugging purposes only. If
enabled during normal operation, the maximum operating temperature is rated to
60°C.
6
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