
PRELIMINARY
XRT86SH328
43
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
2.1
OPERATION CONTROL REGISTERS
BIT7 - Unused
BIT6 - Ingress Direction Add-Drop Interface Enable:
This READ/WRITE bit-field is used to either enable or disable the Ingress Direction Add-Drop Interface.
If the Ingress Direction Add-Drop Interface is enabled, then the Ingress Direction Drop Port will drop out the entire traffic
(of all 28 channels in the Ingress Direction) via the IG_TE1RxDATA[7:0] output pins. Additionally, the user can add in
of the 28 DS1 or 21 E1 Ingress Direction signals via the Ingress Direction Add Port.
`
0 - Disables the Ingress Direction Add-Drop Interface.
`
1 - Enables the Ingress Direction Add-Drop Interface.
N
OTE
:
This feature is only available if the XRT86SH328 has been configured to operate in either of the following
modes.·
The VT-Mapper Mode (w/ T1/E1 Framing)
The M13 MUX Mode (w/ T1/E1 Framing)
The M13 MUX to STS-1/STS-3 Mode
The Transmux Mode
BIT 5 - Egress Direction Add-Drop Interface Enable:
This READ/WRITE bit-field is used to either enable or disable the Egress Direction Add-Drop Interface.
If the user enables the Egress Direction Add-Drop Interface, then the Egress Direction Drop Port will drop out the entire
traffic (of all 28 channels in the Egress Direction) via the EG_TE1RxDATA[7:0] output pins. Additionally, the user can
add in any of the 28 DS1 or 21 E1 Egress Direction signals via the Egress Direction Add Interface.
`
0 - Disables the Egress Direction Add-Drop Interface.
`
1 - Enables the Egress Direction Add-Drop Interface.
N
OTE
:
This feature is only available if the XRT86SH328 has been configured to operate in either of the following
modes.
The VT-Mapper Mode (w/ T1/E1 Framing)
The M13 MUX Mode (w/ T1/E1 Framing)
The M13 MUX to STS-1/STS-3 Mode
The Transmux Mode
BIT 4 - Parallel Interface Enable
N
OTE
:
This bit-field is only valid if the XRT86SH328 has been configured to operate in the 28-Channel DS1/E1 Framer
& LIU Mode.
BIT[3:0] - Mode Select Bits[3:0]:
These four READ/WRITE bit-fields are used to select the mode that the XRT86SH328 will operate in, as shown in the
table below below.
T
ABLE
27: O
PERATION
C
ONTROL
R
EGISTER
- B
YTE
3 (A
DDRESS
= 0
X
0000)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Ingress
Direction
Add-Drop
Interface
Enable
Egress
Direction
Add-Drop
Interface
Enable
Parallel
Interface
Enable
Mode_Select[3:0]
R/O
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0