
XRT86SH328
PRELIMINARY
160
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
BIT [7:4] - Unused
BIT 3 - Latch Count
`
A "0 to 1" transition within this bit-field commands each of the VT-De-Mapper blocks to update the contents within the
following Bit-Fields/PMON registers.
BIT 2 - REI-V Enable
This READ/WRITE bit-field is used to configure a given Transmit VT-Mapper block to automatically insert the
appropriate REI-V value (based upon the number of B2 bit errors that are detected by the corresponding Receive VT-
Mapper block) into the V5 byte, within its outbound VT1.5 or VT2 data-stream.
`
0 - Configures the Transmit VT-Mapper block to NOT automatically insert the REI-V value into each V5 byte, within
the outbound VT data-stream.
`
1 - Configures the Transmit VT-Mapper block to automatically insert the REI-V value into each V5 byte, within the
outbound VT data-stream.
BIT 1 - Unused
BIT 0 - VT Mpper SONET/SDH Loop-Back
This READ/WRITE bit-field permits the user to configure the XRT86SH328 device to operate in the "VT Mapper
SONET/SDH Loop-back" Mode. If the user configures the XRT86SH328 device to operate in this mode, then the
outputs (from each of the 28 VT-Mapper blocks) will be internally looped back into the inputs of their corresponding VT-
De-Mapper block.
Figure _ presents an illustration of the XRT86SH328 device whenever it has been configured to operate in the "VT
Mapper SONET/SDH Loop-back" Mode.
Figure _, Illustration of the Functional Block Diagram of the XRT86SH328 device with the "VT-Mapper
SONET/SDH Loop-back" path depicted.
B
IT
F
IELDS
R
EGISTER
N
AME
A
DDRESS
L
OCATION
VT-Payload Pointer
Increment Count[3:0]
Channel Control VT Mapper Block - Egress Direction - BIP-2
Error Count Register - Byte 1
0xND4A
BIP-2 Error Count[11:8]
Channel Control VT Mapper Block - Egress Direction - BIP-2
Error Count Register - Byte 1
0xND4A
BIP-2 Error Count[7:0]
Channel Control VT Mapper Block - Egress Direction - BIP-2
Error Count Register - Byte 0
0xND4B
VT-Payload Pointer Dec-
rement Count[3:0]
Channel Control - VT Mapper Block - Egress Direction - REI-V
Event Count Register - Byte 1
0xND4E
REI-V Event Count[11:8] Channel Control - VT Mapper Block - Egress Direction - REI-V
Event Count Register - Byte 1
0xND4E
REI-V Event Count[7:0]
Channel Control - VT Mapper Block - Egress Direction - REI-V
Event Count Register - Byte 0
0xND4F