DS92UT16 Datasheet, PDF (10/111 Pages) Texas Instruments – DS92UT16TUF UTOPIA-LVDS Bridge for 1.6 Gbps Bi-directional Data Transfers

DS92UT16
OBSOLETE
SNOS992E – JANUARY 2002 – REVISED APRIL 2013
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F Channel Byte Usage Within the Frame
For the majority of time, the F Channel F1/F2 bytes are used as a flow control opportunity, providing a rapid
throttle-back mechanism as described in Flow Control. In addition, a small number of F bytes are stolen in a
regular fashion to provide a low bandwidth OAM channel. This is controlled by the TC number within the frame,
as illustrated in Table 4. Hence, an OAM channel is formed by the F1/F2 bytes in TCs 6, 13, 20, 27, 34, 41, 48
and 55, with the F1/F2 bytes in the remaining containers forming a flow control signaling channel.
TC0
Flow Control 3
Flow Control 2
TC7
Flow Control 3
Flow Control 2
TC14
Flow Control 3
Flow Control 2
TC21
Flow Control 3
Flow Control 2
TC28
Flow Control 3
Flow Control 2
TC35
Flow Control 3
Flow Control 2
TC42
Flow Control 3
Flow Control 2
TC49
Flow Control 3
Flow Control 2
Table 4. F Channel Byte Usage Within the Frame
TC1
Flow Control 1
Flow Control 0
TC8
Flow Control 1
Flow Control 0
TC15
Flow Control 1
Flow Control 0
TC22
Flow Control 1
Flow Control 0
TC29
Flow Control 1
Flow Control 0
TC36
Flow Control 1
Flow Control 0
TC43
Flow Control 1
Flow Control 0
TC50
Flow Control 1
Flow Control 0
TC2
Flow Control 3
Flow Control 2
TC9
Flow Control 3
Flow Control 2
TC16
Flow Control 3
Flow Control 2
TC23
Flow Control 3
Flow Control 2
TC30
Flow Control 3
Flow Control 2
TC37
Flow Control 3
Flow Control 2
TC44
Flow Control 3
Flow Control 2
TC51
Flow Control 3
Flow Control 2
TC3
Flow Control 1
Flow Control 0
TC10
Flow Control 1
Flow Control 0
TC17
Flow Control 1
Flow Control 0
TC24
Flow Control 1
Flow Control 0
TC31
Flow Control 1
Flow Control 0
TC38
Flow Control 1
Flow Control 0
TC45
Flow Control 1
Flow Control 0
TC52
Flow Control 1
Flow Control 0
TC4
Flow Control 3
Flow Control 2
TC11
Flow Control 3
Flow Control 2
TC18
Flow Control 3
Flow Control 2
TC25
Flow Control 3
Flow Control 2
TC32
Flow Control 3
Flow Control 2
TC39
Flow Control 3
Flow Control 2
TC46
Flow Control 3
Flow Control 2
TC53
Flow Control 3
Flow Control 2
TC5
Flow Control 1
Flow Control 0
TC12
Flow Control 1
Flow Control 0
TC19
Flow Control 1
Flow Control 0
TC26
Flow Control 1
Flow Control 0
TC33
Flow Control 1
Flow Control 0
TC40
Flow Control 1
Flow Control 0
TC47
Flow Control 1
Flow Control 0
TC54
Flow Control 1
Flow Control 0
TC6
Alarm/Sig.
Link Labels
TC13
ECC1
ECC2
TC20
ECC3
ECC4
TC27
BIP16
TC34
Reserved
TC41
ECC5
ECC6
TC48
ECC7
ECC8
TC55
BIP16
OAM Channel
Remote Alarm and Signaling Byte
A byte-wide remote alarm and signaling channel is carried in the F1 byte in TC6 as shown in F Channel Byte
Usage Within the Frame. This provides a means for the device at the far end of the LVDS link to signal an alarm
condition to the near end and vise-versa. This byte also contains the ECC flow control signals. The format of this
byte is as shown in Table 5 below. Bit [0] is reserved.
Bit
Function
Table 5. Remote Alarm and Signaling Byte
7
6
5
4
3
2
1
0
RLOSA
RLOSB RBA
RDSLL
EVN ESSA ESSB
Res
• RLOSA Remote Loss Of Signal lock at far end device receive port A.
• RLOSB Remote Loss Of Signal lock at far end device receive port B.
• RBA Remote far end device active receive port. Set = remote receive port B active and Clear = remote receive
port A active.
• RDSLL Remote far end device active port Descrambler Loss of Lock. Set = Out of lock and Clear = In lock.
• EVN ECC Tx Data Valid/Null indication.
• ESSA ECC RxA Stop/Start indication.
• ESSB ECC RxB Stop/Send indication.
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