
XRT86SH328
PRELIMINARY
154
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
bits within the Pointer Word.
BIT [7:0] - H2 Pointer Value[1:0]
These eight READ/WRITE bit-fields, along with the constants of bits 1 and 0 within the Transmit STS-1/STS-3 Path -
Transmit Arbitrary H1 Pointer Register (Address Location= 0x07C3) are used to provide the contents of the Pointer
Word. These two READ/WRITE bit-fields are used to define the value of the eight least significant bits within the Pointer
word.
`
Whenever a 0 to 1 transition occurs in BIT 5 (Pointer Force) within the Transmit STS-1/STS-3 Path - Transmit Path
Control Register (Address Location= 0x07B7), the values of these eight bits will be loaded into the H2 byte, within the
outbound STS-1 or STS-3 Data stream.
BIT [7:2] - Unused
BIT [1:0] - Transmit Pointer Word - High[1:0]
These two READ-ONLY bits, along with the contents of the Transmit STS-1/STS-3 Path - Transmit Current Pointer Byte
Register - Byte 0 (Address Location= 0x07C7) reflect the current value of the pointer (or offset of SPE within the STS-
1/STS-3 frame). These two bits contain the two most significant bits within the 10-bit pointer word.
BIT [7:0] - Transmit Pointer Word - Low[7:0]
These two READ-ONLY bits, along with the contents of the Transmit STS-1/STS-3 Path - Transmit Current Pointer Byte
Register - Byte 1 (Address Location= 0x07C6) reflect the current value of the pointer (or offset of SPE within the STS-
1/STS-3 frame). These two bits contain the eight least significant bits within the 10-bit pointer word.
T
ABLE
205: T
RANSMIT
STS-1/STS-3 P
ATH
- T
RANSMIT
A
RBITRARY
H2 P
OINTER
R
EGISTER
(A
DDRESS
L
OCATION
=
0
X
07C3)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
H2 Pointer 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
206: T
RANSMIT
STS-1/STS-3 P
ATH
- T
RANSMIT
C
URRENT
P
OINTER
B
YTE
R
EGISTER
- B
YTE
1 (A
DDRESS
L
OCATION
= 0
X
07C6)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Unused
Tx_Pointer_High[1:0]
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
0
0
0
0
0
0
1
0
T
ABLE
207: T
RANSMIT
STS-1/STS-3 P
ATH
- T
RANSMIT
C
URRENT
P
OINTER
B
YTE
R
EGISTER
- B
YTE
0 (A
DDRESS
L
OCATION
= 0
X
07C7)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Tx_Pointer_Low[7:0]
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
0
0
0
0
1
0
1
0