Rainbow Electronics TS81102G0 User Manual
Page 20
20
TS81102G0
2105C–BDC–11/03
Figure 17.
Synchronous Reset, 1:4 Ratio, DR Mode
Example of Synchronous Reset’s utility in case of de-synchronization of the DMUX output port
selection. The de-synchronization event happens after the selection of Port D.
DMUXDelAdjCtrl value is nominal. TSSR < 0 because of Clkln’s internal propagation delay
TCPD. After selection of Port C, instead of selecting Port D, the de-synchronization makes the
port selection to restart on Port A. Since Port H was not selected, the data is not output to the
ports but the last data (d1 to d8) is latched until the next selection of Port H. d9 to d16 are lost.
The synchronous Reset ensures a re-synchronization of the port selection.
Figure 18.
Synchronous Reset, 1:8 ratio, DR/2 Mode
Example of Synchronous Reset’s utility in case of de-synchronization of the DMUX output port
selection. The de-synchronization event happens after the selection of Port D.
DMUXDelAdjCtrl value is nominal. TSSR < 0 because of Clkln’s internal propagation delay
TCPD. After selection of Port C, instead of selecting Port D, the de-synchronization makes the
port selection to restart on Port A. Since Port H was not selected, the data is not output to the
ports but the last data (d1 to d4) is latched until the next selection of Port H. d5 to d8 are lost.
The synchronous Reset ensures a re-synchronization of the port selection.
Clkn
SyncReset
Internal Port Selection
(not available out of the DEMUX)
A
B
C
D
B
C
D
A
B
C
D
A
B
C
D
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10
d11
d9
d1
d10
d11
d3
d12
d4
d2
d12
d13
d14
d15
d16
THSR
TOD
TSSR
Period of uncertainty due to desynchronization
TCPD
TDRF
TDRR
I[0..9]
A[0..9]
B[0..9]
C[0..9]
D[0..9]
DR
THSR
TSSR
Clkn
SyncReset
Internal Port Selection
(not available out of the DEMUX)
A
B
C
D
d1
d0
d2
d3
d4
d5
d6
d7
d8
d9
d10 d11
d17
d1
d18
d19
d3
d21
d5
d23
d7
d24
d8
d20
d4
d22
d6
d2
d12 d13
d14 d15 d16 d17 d18 d19 d20 d21
d22 d23 d24 d25 d26
d27
E
D
E
F
G
H
B
A
C
B
A
C
D
E
F
G
H
B
A
C
D
B
A
C
THSR
TCPD
TOD
TSRR
THSR
TSRR
Period of uncertainty due to desynchronization
TCPD
TOD
TDRF
TSDRR
TDRR
TDRF
I[0..9]
A[0..9]
B[0..9]
C[0..9]
D[0..9]
E[0..9]
F[0..9]
G[0..9]
H[0..9]
DR