Rainbow Electronics DS31256 - Manual (Page 58)

DS31256
58 of 181
Figure 6-5. Receive V.54 Host Algorithm
Set Up the
DS0 Channel
Search
Toggle VRST
Wait for
SLBP = 1
VTO = 1?
Place DS0
Channels into
Loopback
Yes
No
Wait for
SLBP = 1
Take DS0
Channels out
of Loopback
v54host
SLBP is a status bit that is reported
in the SV54 register (see Section 4.3)
VRST is a control bit that is in the Receive
Port Control Register (see Section 5.2)
VTO is a status bit that is in the Receive
Port Control Register (see Section 5.2)
SLBP is a status bit that is reported
in the SV54 register (see Section 4.3)
DS0 channels can be configured to search
for the V.54 loop pattern via the Receive
Layer 1 Configuration Register (see Section 5.3)
NOTES ALGORITHM
DS0 channels can be placed into loopback
via the Receive Layer 1 Configuration Register
(see Section 5.3)
DS0 channels can be taken out of loopback
via the Receive Layer 1 Configuration Register
(see Section 5.3)