TLK3134_1 Datasheet, PDF (17/150 Pages) Texas Instruments – 4-Channel Multi-Rate Transceiver

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TLK3134
4-Channel Multi-Rate Transceiver
SLLS838D – MAY 2007 – REVISED JULY 2008
2.3 CPRI Latency Support
The TLK3134 has a round trip latency measurement capability to support its use in CPRI applications.
When enabled, the TLK3134 will measure the elapsed time from the transmission of a K28.5 code in a
CPRI frame until the reception of a K28.5 code in the receive path. This measurement result may be read
through an MDIO readable register. The measurement has an accuracy of ±4 ns with the Jitter Cleaner
PLL enabled, and an accuracy of ±2 parallel byte clock periods if the Jitter Cleaner PLL is disabled.
2.4 Powerdown Mode
The TLK3134 (through the ENABLE pin and through register control) is capable of going into a low power
quiescent state. In this state, all analog and digital circuitry is disabled.
2.5 Application Examples
TLK3134 supports many different application modes. Detailed register settings per application mode are
shown in Table 2-2. The following application diagrams do not show all possible applications, and are
intended only to illustrate the flexibility of the device.
Figure 2-1 shows the TLK3134 in a Quad independent channel SERDES Application. The 1000Base-X
PCS layer can be enabled or disabled. Note that in independent channel mode, the 8B/10B
encoder/decoder functions can either be turned on or turned off. When turned off, either 5 or 10 bits
(DDR/SDR) of data is accepted from and presented to the parallel side. When the 8B/10B
encoder/decoder functions are enabled, 1 bit of control and 8 bits of data are accepted from and
presented to the parallel side using the standardized (R)GMII control characters.
TLK3134
10
1
10
1
10
1
10
1
10
1
10
1
10
1
10
1
Figure 2-1. Quad 10-Bit SERDES Application
Figure 2-2 shows the TLK3134 in a XAUI Loopback Application. It is possible to configure XAUI side
loopback in SERDES mode for all 4 channels on an individual basis.
TLK3134
4
XGXS CORE
36
4
Figure 2-2. XAUI Mode – XAUI (Serial) Loopback Application
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Detailed Description
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