CN8223 Datasheet, PDF (139/161 Pages) Conexant Systems, Inc – ATM Transmitter/Receiver with UTOPIA Interface

CN8223
ATM Transmitter/Receiver with UTOPIA Interface
Figure 4-1. Local Processor Interface Timing
t_prh
PRCLK
CS~
4.0 Electrical and Mechanical Specifications
4.3 Timing
t_prclk
t_prl
AS~
W/R~
Set Up
4 ns Min
(t_aspr and t_cspr)
A[7:1]
Set Up
1 ns Min
(t_apr and t_wpr)
VALID
Hold
8 ns Min
Hold
5 ns Min
Hold t_prh plus
2 ns Min
(t_pras)
Hold
8 ns Min
(t_csph)
Invalid
t _prl – 4 ns
D[15:0]
(Read Operation)
OE~
Address Latched
in CN8223
VALID
Hold
11 ns Max
(t_pdd and t_pdv)
Valid 6 ns. Max
(t_odd and t_odv)
D[15:0]
(Write Operation)
Set Up
1 ns Min
(t_dpr)
Hold
3.2 ns Min
(t_pdi and t_pdz)
Invalid 4.9 ns Max
(t_odi and t_odz)
VALID
Hold
3 ns Min
(t_prd)
100046C
Conexant
4-5