TFRA08C13-DB AGERE [Agere Systems], TFRA08C13-DB Datasheet - Page 104

• Manufacturer Part Number: TFRA08C13-DB
• Description: TFRA08C13 OCTAL T1/E1 Framer
• Manufacturer: AGERE [Agere Systems]

TFRA08C13 OCTAL T1/E1 Framer
* The ORCA Series 3 FPGA data sheet contains more information on how to control these signals during start-up. The timing of DONE release
Concentration Highway Interface
CHI Offset Programming
To facilitate bit offset programming, two additional internal parameters are introduced: CEX is defined as the clock
edge with which the first bit of time slot 0 is transmitted; CER is defined as the clock edge on which bit 0 of time slot
0 is latched. CEX and CER are counted relative to the edge on which the CHIFS signal is sampled. Values of CEX
and CER depend upon the values of the parameters described above.
The following table gives decimal values of CEX and CER for various values of TFE, RFE, TCE, RCE, TOFF[2:0],
and ROFF[2:0]. The byte (time slot) offsets are assumed to be zero in the following examples.
Table 46. Programming Values for TOFF[2:0] and ROFF[2:0] when CMS = 0
Figure 41 shows an example of the relative timing of CHI 2.048 Mbits/s data with the following parameters:
104
is controlled by one set of bit stream options, and the timing of the simultaneous release of all other configuration pins (and the activation of all
user I/Os) is controlled by a second set of options.
RFE/
CMS = 0, TFE, RFE = 0.
TCE = 1, TOFF[2:0] = 000, TBYOFF[6:0] = 0000000.
RCE = 0, ROFF[2:0] = 000, RBYOFF[6:0] = 0000000.
RCHIDATA: RCE = 0
TFE
TCHIDATA: TCE = 1
0
0
1
1
RCE/
TCE
CHICK
CHIFS
0
1
0
1
Figure 41. TCHIDATA and RCHIDATA to CHICK Relationship with CMS = 0
000
4
3
3
4
001
6
5
5
6
(CEX = 3 and CER = 4, Respectively)
HIGH IMPEDANCE
010
8
7
7
8
(continued)
ROFF[2:0] or TOFF[2:0]
011
10
10
9
9
1
CHIFS IS SAMPLED ON THIS EDGE: FE = 0
2
CEX = 3
100
12
11
11
12
CER = 4
3
BIT 0, TS 0
BIT 0, TS 0
101
14
13
13
14
4
5
110
16
15
15
16
BIT 1, TS 0
BIT 1, TS 0
Preliminary Data Sheet
6
111
18
17
17
18
Lucent Technologies Inc.
7
Lucent Technologies Inc.
(decimal)
8
October 2000
BIT 2, TS 0
BIT 2, TS 0
CER
CEX
or
5-2202(F).d