User guide

18
TS81102G0
2105C–BDC–11/03
With a nominal tuning of DMUXDelAdj, at 1 GHz (1:4 mode) d1 data is lost because of the
internal clock’s path propagation delay TCPD. TCPD is tuned with DMUXDelAdjCtrl pins and
is used to obtain good setup and hold times between Clkln and the input data.
Figure 14. Start with Asynchronous Reset, 1:4 Ratio, DR Mode
With a nominal tuning of DMUXDelAdj, at 1 GHz (1:4 mode) d1 data is lost because of the
internal clock’s path propagation delay TCPD. TCPD is tuned with DMUXDelAdjCtrl pins and
is used to obtain good setup and hold times between Clkln and the input data. This timing dia-
gram does not change with the opposite phase of Clkln.
Figure 15. Start with Asynchronous Reset, 1:4 Ratio, DR/2 Mode
TRAR
PWAR
TFAR
Clkn
ASyncReset
Internal Port Selection
(not available out of the DEMUX)
ABCD
d1 d2 d3 d4 d5 d6 d7 d8
d5
d6
d7
d8
d2
d3
d4
BACD
TPD
TCPD
TOD
TRDR
TFDR
TROD/TFOD
TOD
TDRF TDRR
TDRR
TARDR
I[0..9]
A[0..9]
B[0..9]
C[0..9]
D[0..9]
DR
TRAR
PWAR
TFAR
Clkn
ASyncReset
Internal Port Selection
(not available out of the DEMUX)
A
B
CD
d1 d2 d3 d4 d5 d6 d7 d8
d5
d6
d7
d8
d2
d3
d4
BA C
TPD
TCPD
TOD
TRDR
TFDR
TROD/TFOD
TOD
TDRF
TCPD
TDRR
TARDR
I[0..9]
A[0..9]
B[0..9]
C[0..9]
D[0..9]
DR