CN8223 Datasheet, PDF (142/161 Pages) Conexant Systems, Inc – ATM Transmitter/Receiver with UTOPIA Interface

4.0 Electrical and Mechanical Specifications
4.3 Timing
CN8223
ATM Transmitter/Receiver with UTOPIA Interface
Figure 4-3. Line Interface Timing–Internal Framers
TXCKI,TXCKIHS
TCLKO
TXDATO
1
5
6
2
3
4
TXPOS, TXNEG
RXCKI,RXCKIHS
RXDATI
RXPOS, RXNEG
7
10
11
8
12
9
13
Table 4-5. Parallel Interface Timing
Name
Interval
Description
ttxcki
ttxh
tcid
tcdel
tdscr
tdhcf
trxcki
trxh
tdck
tckd
tdsck
tckds
1–4
4–5
1–2
1–3
6–7
8–9
11–15
11–13
10–11
11–14
12–13
15–16
Transmit Clock Period
Transmit Clock Pulse Width High⁽¹⁾
Transmit Clock In to Data Out
Transmit Clock In to Delineation Out
Transmit Disable Setup to Transmit Clock Rising Edge
Transmit Disable Hold after Transmit Clock Falling Edge
Receive Clock Period
Receive Clock Pulse Width High⁽¹⁾
Receive Data Setup to Receive Clock Falling Edge
Receive Data Hold After Receive Clock Falling Edge
Receive Disable Setup to Receive Clock Rising Edge
Receive Disable Hold after Receive Clock Falling Edge
NOTE(S):
(1) _{Duty cycle must be 45/55 at maximum input clock rate.}
Min
Max
50
—
20
—
4.6
16.5
3.9
14.6
0
—
3.0
—
50
—
20
—
2.3
—
3.7
—
3.0
—
3.0
—
4-8
Conexant
100046C