CN8223
4.0 Electrical and Mechanical Specifications
ATM Transmitter/Receiver with UTOPIA Interface
4.3 Timing
4.3.5 TAXI Interface Timing
Table 4-9 and Figure 4-8 display the timing requirements and characteristics of
the TAXI interface. All times are in nanoseconds.
Table 4-9. TAXI Interface Timing
Name
Interval
Description
Transmit Clock Input Period
Min
Max
tptx
1–5
50
—
ttcl
1–3
3–5
Transmit Clock High Pulse Width
25
25
3.0
tptx/2
25
24
22
25
50
25
25
4
—
—
—
12.0
—
—
—
—
—
—
—
—
—
—
—
—
—
ttch
Transmit Clock Low Pulse Width
tclsh
tsh
3–4
Transmit Clock Low to Strobe Output High
Strobe Output Pulse Width High
4–6
tcssh
tchsh
tdssh
tdhsh
tprx
2–4
Command Out Setup before Strobe High
Command Out Hold after Strobe High
Data Out Setup before Strobe High
Data Out Hold after Strobe High
4–7
8–9
9–10
11–17
11–14
14–17
12–14
13–14
14–15
14–16
18–19
19–20
Receive Clock Input Period
trcl
Receive Clock Low Pulse Width
trch
Receive Clock High Pulse Width
tssch
tcsch
tshch
tchch
tdsch
tdhch
Command Strobe Setup before Clock High
Command Input Setup before Clock High
Command Strobe Hold after Clock High
Command Input Hold after Clock High
Data/Violation Input Setup before Clock High
Data/Violation Input Hold after Clock High
8
0
5
5
5
100046C
Conexant
4-15
CONEXANT [ CONEXANT SYSTEMS, INC ]
