CN8223 Datasheet, PDF (143/161 Pages) Conexant Systems, Inc – ATM Transmitter/Receiver with UTOPIA Interface

CN8223
ATM Transmitter/Receiver with UTOPIA Interface
4.0 Electrical and Mechanical Specifications
4.3 Timing
Figure 4-4. Parallel Interface Timing
1
TXCKI
TXOD
2
TXDAT[7:0]
3
TXDELO
RXCKI
RXOD
RXDAT[7:0]
4
5
7
8
6
9
11
13 15
12
16
10
14
Table 4-6. Overhead Port Interface Timing
Name
Interval
Description
Min
Max
tptx,tprx
—
Transmit or Receive Clock Input Period
6.4
—
ttckh
2–4
Transmit Overhead Clock Pulse Width High
4 × tptx
—
ttmtck
1–2
Transmit Marker Valid before Transmit Clock High
3 × tptx
—
tdtck
3–4
Transmit Overhead Data Setup before Clock Falling Edge
6.0
—
ttckd
4–5
Transmit Overhead Data Hold after Clock Falling Edge
6.0
—
trck1h
8–9
Receive Overhead Clock1 Pulse Width High
4 × tprx
—
tm1rck1
6–8
Marker1 Valid before Clock1 Rising Edge
3 × tprx
—
tdrck1
7–8
Receive Overhead Data Valid before Clock1 Rising Edge
3 × tprx
—
trck1d
8–10
Receive Overhead Data Valid after Clock1 Rising Edge
2 × tprx
—
trck0h
13–14
Receive Overhead Clock0 Pulse Width High
4 × tprx
—
tm0rck0
12–13
Marker0 Valid before Clock0 Rising Edge
3 × tprx
—
tdrck0
11–13
Receive Overhead Data Valid before Clock0 Rising Edge
3 × tprx
—
trck0d
13–15
Receive Overhead Data Valid after Clock0 Rising Edge
2.4
—
100046C
Conexant
4-9