ds3171n Maxim Integrated Products, Inc., ds3171n Datasheet - Page 40

• Manufacturer Part Number: ds3171n
• Description: Ds3171, Ds3172, Ds3173, Ds3174 Single/dual/triple/quad Ds3/e3 Single-chip Transceivers
• Manufacturer: Maxim Integrated Products, Inc.

Figure 8-10
Figure 8-10. DS3 Framing Transmit Overhead Port Timing
Figure 8-11
Figure 8-11. E3 G.751 Framing Transmit Overhead Port Timing
Figure 8-12
Figure 8-12. E3 G.832 Framing Transmit Overhead Port Timing
8.3.3
8.3.3.1
The TSERn pin is used to input DS3 or E3 payload data bits in all framing modes as well as the C-bits, which can
be treated as payload, in DS3 M23 and E3 G.751 framing modes. The TDENn signal is used to determine the DS3
or E3 payload bit positions on TSERn. The TDENn signal goes high three clocks before the first bit of a payload
sequence is clocked into the TSERn pin and it goes low three clocks before the payload sequence is stopped
being clocked in to the TSERn pin. The TSOFOn signal pulses high three clocks before the start of the DS3 or E3
overhead bit position on TSERn. The TSOFIn pin is used to set the DS3 or E3 frame position. When the TSOFIn
pin transitions low to high, the first DS3/E3 overhead bit position on TSERn will be forced to align to it
Figure 8-13
TOHCLK
TOHCLK
TOHSOF
TOHSOF
TOHCLK
TOHSOF
TOHEN
TOHEN
TOHEN
TOH
TOH
TOH
DS3/E3 Serial Data Interface
DS3/E3 SCT Mode Transmit Serial Interface Pin Functional Timing
shows the relationship between the DS3 transmit overhead port pins.
shows the relationship between the E3 G.751 transmit overhead port pins.
shows the relationship between the E3 G.832 transmit overhead port pins.
to
FAS
1
1
GC
10
Figure 8-15
6
F73
1
2
2
GC
C73
2
A
7
3
3
GC
F74
3
N
8
FAS
4
FA1
4
show the relationship between the SCT transmit port pins.
4
1
1
X1
FAS
5
FA1
5
5
2
2
F11
FAS
6
FA1
6
C11
6
3
3
FAS
7
FA1
7
F12
7
4
4
FAS
8
FA1
8
C12
8
5
5
FAS
9
FA1
9
F13
9
6
6
10
10
FAS
10
FA1
C13
7
7
11
11
11
FAS
FA1
F14
8
8
40
12
12
12
FAS
FA2
1
X2
9
13
13
13
FAS
FA2
F21
10
2
14
14
14
FA2
C21
A
3
15
15
15
FA2
F22
N
4
16
16
16
FAS
FA2
C22
1
5
17
17
17
FAS
FA2
F23
2
6
18
18
18
FAS
FA2
C23
3
7
19
19
19
FAS
FA2
F24
4
8
20
20
20
FAS
P1
E M
5
1
21
21
21
FAS
F31
E M
6
2
22
22
22
FAS
C31
E M
8
3
23
23
23
FAS
E M
F32
9
4
24
C32
FAS
24
24
E M
9
5