CN8223 Datasheet, PDF (147/161 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
4.3.4 UTOPIA Interface Timing
Table 4-8 and Figure 4-7 display the timing requirements and characteristics of
the UTOPIA interface. All times are in nanoseconds.
Table 4-8. UTOPIA Interface Timing
Name
Interval
Description
t_T1
1–4
Transmit Clock Input Period
t_T2
1–3
Transmit Clock High Pulse Width
t_cff
1–2
Transmit Clock High to Full Flag Output Valid
t_tes
6–7
TxEnb~ Setup to Transmit Clock Rising Edge
t_dsu
5–7
TxData, TxPrty, TxSOC Setup to Transmit Clock
t_teh
4–6
TxEnb~ Hold after Transmit Clock Rising Edge
t_dh
7–8
TxData, TxPrty, TxSOC Hold after Transmit Clock
t_R1
9–12
Receive Clock Input Period
t_R2
9–11
Receive Clock High Pulse Width
t_cef
9–10
Receive Clock High to Empty Flag Output Valid
t_cd
14–15
Receive Clock High to RxData, RxPrty, RxSOC Valid
t_res
13–14
RxEnb~ Setup to Receive Clock Rising Edge
t_reh
12–13
RxEnb~ Hold after Receive Clock Rising Edge
Min
Max
40
—
16
24
3
10
8
—
8
—
1
—
1
—
40
—
16
24
3
10
3
10
8
—
1
—
100046C
Conexant
4-13