S2070 Datasheet, PDF (6/20 Pages) Applied Micro Circuits Corporation – FIBRE CHANNEL/GIGABIT ETHERNET TRANSCEIVER

S2070
FIBRE CHANNEL/GIGABIT ETHERNET TRANSCEIVER
Table 5. Pin Description and Assignment
Pin Name
Level
I/O
Pin #
Description
TX[9]
TX[8]
TX[7]
TX[6]
TX[5]
TX[4]
TX[3]
TX[2]
TX[1]
TX[0]
LVTTL
I
13
Transmit Data. Parallel data on this bus is clocked in on the rising
12
edge of TBC. TX[0] is transmitted first.
11
9
8
7
6
4
3
2
TBC
LVTTL
I
22
Transmit Byte Clock. Reference clock input to the PLL clock
multiplier. The frequency of TBC is the bit rate divided by 10. When
TESTEN is active, TBC replaces the VCO clock to facilitate factory
test. TBC should be supplied by a crystal controlled reference
since jitter on this line directly translates to jitter on the output data.
RATEN
LVTTL
I
14
Rate Select. Active Low. This signal configures the PLL's for the
appropriate TBC frequency. When inactive, the device operates
in 1/2 rate mode. When active, the device operates in full rate
mode. See Tables 2 and 4.
EN_CDET
LVTTL
I
24
Enable Comma Detect. Active High. When active, enables
detection of the COMMA sync pattern to set the word frame
boundary for the data to follow. When inactive, data is treated as
unframed.
EWRAP
LVTTL
I
19
Enable Wrap. Active High. When active, the transmitter serial data
outputs are internally routed to the receiver serial data inputs.
TXP/N are static (logic 1) in this state. When inactive, the RXP/N
serial inputs are selected (normal operation).
RXP
RXN
Diff.
I
LVPECL
54
(Externally capacitively coupled.) LVPECL Receive Serial Data
52
Inputs. RXP is the positive differential input, RXN is negative.
Internally biased to VCC -1.3 V.
–LCK_REF
LVTTL
I
27
Note: All TTL inputs have internal 15KΩ pull-up networks.
Lock to Reference Input. Active Low. When inactive or open, the
receive PLL will lock to the incoming data (normal operation).
When active, the receive PLL is forced to lock to the TBC input.
6
March 7, 2001 / Revision G