
PRELIMINARY
XRT86SH328
151
REV. P1.0.6
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
BIT [7:0] - Transmit Z5 Byte Value
These READ/WRITE bit-fields are used to have software control over the value of the Z5 byte, within each outbound
STS-1/STS-3 SPE.
If the user configures the Transmit STS-1/STS-3 POH Processor block to this register as the source of the Z5 byte, then
it will automatically write the contents of this register into the Z5 byte location, within each outbound STS-1/STS-3 SPE.
This feature is enabled whenever the user writes a 0 into BIT 3 (Z5 Insertion Type) within the Transmit STS-1/STS-3
Path - SONET Control Register - Byte 0 register (Address Location= 0x0782).
BIT [7:6] - Unused
BITt 5 - Pointer Force
This READ/WRITE bit-field is used to load the values contained within the Transmit STS-1/STS-3 POH Arbitrary H1
Pointer and Transmit STS-1/STS-3 POH Arbitrary H2 Pointer registers (Address Location= 0x07BF and 0x07C3) into
the H1 and H2 bytes (within the outbound STS-1 or STS-3 Data stream).
The actual location of the SPE will NOT be adjusted, per the value of H1 and H2 bytes. Hence, this feature should cause
the remote terminal to declare an Invalid Pointer condition.
`
0 - Configures the Transmit STS-1/STS-3 POH and TOH Processors to transmit STS-1 or STS-3 Data with normal
and correct H1 and H2 bytes.
`
1 - Configures the Transmit STS-1/STS-3 POH and TOH Processor blocks to overwrite the values of the H1 and H2
bytes (in the outbound STS-1 or STS-3 Data-stream) with the values in the Transmit STS-1/STS-3 POH Arbitrary H1
and H2 Pointer registers.
BITt 4 - Check Stuff Monitoring
This READ/WRITE bit-field is used to configure the Transmit STS-1/STS-3 POH and TOH Processor blocks to only
execute a Positive, Negative or NDF event (via the Insert Positive Stuff, Insert Negative Stuff, Insert Continuous or
Single NDF options, via software command) if no pointer adjustment (NDF or otherwise) has occurred during the last 3
STS-1/STS-3 frame periods.
`
0 - Disables this feature.In this mode, the Transmit STS-1/STS-3 POH and TOH Processor block will execute a
software-commanded pointer adjustment event, independent of whether a pointer adjustment event has occurred in the
last 3 STS-1/STS-3 frame periods.
`
1 - Enables this feature.In this mode, the Transmit STS-1/STS-3 POH and TOH Processor block will ONLY execute
a software-commanded pointer adjustment event, if no pointer adjustment event has occurred during the last 3 STS-
1/STS-3 frame periods.
BITt 3 - Insert Negative Stuf
This READ/WRITE bit-field is used to configure the Transmit STS-1/STS-3 POH and TOH Processor blocks to insert a
negative-stuff into the outbound STS-1 or STS-3 Data stream. This command, in-turn will cause a Pointer
T
ABLE
201: T
RANSMIT
STS-1/STS-3 P
ATH
- T
RANSMIT
Z5 B
YTE
V
ALUE
R
EGISTER
(A
DDRESS
L
OCATION
= 0
X
07B3)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit_Z5_Byte_Value[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
T
ABLE
202: T
RANSMIT
STS-1/STS-3 P
ATH
- T
RANSMIT
P
ATH
C
ONTROL
R
EGISTER
(A
DDRESS
L
OCATION
= 0
X
07B7)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Pointer
Force
Check Stuff
Insert Nega-
tive Stuff
InsertPosi-
tive Stuff
InsertContin-
uous NDF
Events
InsertSingle
NDF Event
R/O
R/O
R/W
R/W
W
W
R/W
R/W
0
0
0
0
0
0
0
0