CHAPTER 2 PIN FUNCTION
PRELIMINARY
NEC confidential and Proprietary
18
(2/2)
Pin Name
Serial No.
Address No.
I/O Level
Function
RDIT0-3
RDIC0-3
I
2.5V
Differential
PECL
Receive serial data input.
The input data is sampled with the recovered clock from
the internal CDR when the internal CDR mode.
CD0-3
I
3.3V
Single-ended
PECL
Carrier Detect.
The receive signal detect PECL input indicates the loss
of receive signal power from the Optical module and it is
active high.
Each port has one pin. CD0 corresponds to PORT0,
while CD3 corresponds to PORT3.
CDVREF
I
3.3V
PECL
This pin input reference potentials (intermediate
potentials) for single-ended PECL input signals (CD0-3).
LPFC0-
LPFC3
Analog
Loop Filter Capacitor the CDR.
The CDR loop filter capacitor is connected to this pin.
Each port has one pin.
LPFCGND0-
LPFCGND3
Analog
Loop Filter Capacitor the CDR.(GND)
The CDR loop filter capacitor is connected to this pin.
Each port has one pin.
BIASC0-3
Analog
Bias pin for CDR
Connects to analog VDD via 1.1K
Ω
register
Summary of Contents for UPD98413
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