VSC7216-01 查看數據表（PDF） - Vitesse Semiconductor
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VSC7216-01 Datasheet PDF : 38 Pages
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VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Datasheet
VSC7216-01
Multi-Gigabit Interconnect Chip
The REFCLK signal can be either single-ended TTL or differential LVPECL. If TTL, connect the TTL
input to REFCLKP but leave REFCLKN open. If LVPECL, connect the inputs to REFCLKP and REFCLKN.
Internal biasing resistors sets the proper DC level to VDD/2.
Serial and parallel data rates for all channels may be halved by means of the RATE pin. When RATE is
HIGH, the chip is in full-speed mode (default mode of operation) and when LOW, the half-speed mode is
selected. Table 1 shows the interaction of the DUAL and RATE inputs.
Table 1: Using the RATE input to Achieve Half-Speed Operation
RATE Pin DUAL Pin
0
0
0
1
1
0
1
1
Clock
Multiplication
Factor
x10
x20
x10
x20
Serial Link
Speed
500Mb/s
500Mb/s
1Gb/s
1Gb/s
Parallel
Data Rate
50Mb/s
50Mb/s
100Mb/s
100Mb/s
REFCLK
Frequency
50MHz
25MHz
100MHz
50MHz
Transmitter Functional Description
Transmitter Data Bus
Each VSC7216-01 transmit channel has an 8-bit input transmit data character, Tn(7:0), and two control
inputs, C/Dn and WSENn. The C/Dn input determines whether a normal data character or a special “K-
character” is transmitted, and the WSENn input initiates transmission of a 16-character “Word Sync Sequence”
used to align the receive channels. These data and control inputs are clocked either on the rising edge of
REFCLK, on the rising edge of TBCn, or within the data eye formed by TBCn. When not using REFCLK, each
channel uses either its own TBCn input, or uses the TBCA input. The transmit interface mode is controlled by
TMODE(2:0) as shown in Table 2.
Table 2: Transmit Interface Input Timing Mode
TMODE(2:0)
000
001
010
011
100
101
110
111
Input Timing Reference
REFCLK Rising Edge
Reserved
TBCA Rising Edge
TBCn Rising Edge
TBCA Data Eye
TBCn Data Eye
G52352-0, Rev 3.2
05/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
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