CN8223 Datasheet, PDF (149/161 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
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
t_ptx
1–5
Transmit Clock Input Period
t_tcl
1–3
Transmit Clock High Pulse Width
t_tch
3–5
Transmit Clock Low Pulse Width
t_clsh
3–4
Transmit Clock Low to Strobe Output High
t_sh
4–6
Strobe Output Pulse Width High
t_cssh
2–4
Command Out Setup before Strobe High
t_chsh
4–7
Command Out Hold after Strobe High
t_dssh
8–9
Data Out Setup before Strobe High
t_dhsh
9–10
Data Out Hold after Strobe High
t_prx
11–17
Receive Clock Input Period
t_rcl
11–14
Receive Clock Low Pulse Width
t_rch
14–17
Receive Clock High Pulse Width
t_ssch
12–14
Command Strobe Setup before Clock High
t_csch
13–14
Command Input Setup before Clock High
t_shch
14–15
Command Strobe Hold after Clock High
t_chch
14–16
Command Input Hold after Clock High
t_dsch
18–19
Data/Violation Input Setup before Clock High
t_dhch
19–20
Data/Violation Input Hold after Clock High
Min
Max
50
—
25
—
25
—
3.0
—
t_ptx/2
12.0
25
—
24
—
22
—
25
—
50
—
25
—
25
—
4
—
8
—
0
—
5
—
5
—
5
—
100046C
Conexant
4-15