TTSI1K16T Datasheet, PDF (45/64 Pages) Agere Systems – 1024-Channel, 16-Highway Time-Slot Interchanger

Preliminary Data Sheet
February 1999
TTSI1K16T
1024-Channel, 16-Highway Time-Slot Interchanger
Configuration Register Architecture (continued)
Table 35. Transmit Highway Configuration Register (Byte 0) (0x1000 + 4i)*
Bit
7
6—4
Symbol
—
XBITOFF
[2—0]
Name/Description
Reserved. Read as 0.
Transmit Highway Bit Offset[2—0]. XBITOFF is used to offset the beginning of
an outgoing frame by the indicated number of bit times. If no bit offsets are
required, these bits should be set to 000. The following list shows the effect of
setting these bits.
000 = no bit offset
001 = 1-bit offset
010 = 2-bit offset
...
111 = 7-bit offset
Note: Bit periods are relative to the highway data rate set for each highway.
3—2
XFBOFF
[1—0]
XTSOFF, XBITOFF, and XFBOFF are used in conjunction to define the start of
the outgoing frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
Transmit Highway Fractional Bit Offset[1—0]. XFBOFF is used to offset the
beginning of an outgoing frame by the indicated number of fractional bit times. If
no fractional bit offsets are required, these bits should be set to 00. The following
list shows the effect of these bits.
00 = no fractional bit offset
01 = 1/4-bit fractional offset
10 = 1/2-bit fractional offset
11 = 3/4-bit fractional offset
Note: Bit periods are relative to the highway data rate set for each highway.
1—0
XTSOFF, XBITOFF, and XFBOFF are used in conjunction to define the start of
the outgoing frame. The values are added together to position the sampling of
time slot 0, bit 0 for each highway.
—
Reserved. Must be written to 00.
* i = the transmit highway number.
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