cx29600 Mindspeed Technologies, cx29600 Datasheet - Page 171

• Manufacturer Part Number: cx29600
• Description: Optiphytm - M155 Sts-3 Sonet/sdh Multiplexer
• Manufacturer: Mindspeed Technologies

CX29600
CX29600 Data Sheet
TXPTHBUF (Transmit Path Trace Circular Buffer)
The TXPTHBUF buffer, the J1 byte, is used to repeatedly transmit a 64-byte, fixed-length string so a receiving
terminal in a path can verify its continued connection to the intended transmitter. The 64-byte J1 transmit
buffers are implemented with a 16-bit wide internal buffer, therefore two writes to the TXPTHBUF register
must be executed before the entire 16-bits is written to the internal buffer.
TXS1 (Transmit S1 Overhead Control Register)
The TXS1 register controls the S1 byte in the transport overhead. This byte transports synchronization status
messages and is defined only for the first STS-1 of the STS-3c signal. These messages provide an indication of
the quality level of the synchronization source of the SONET signal.
29600-DSH-001-B
7-0
7-0
Bit
Bit
Default
Default
00h
xxh
hex address:
hex address: 0x027
TxPthBuf[7:0]
TxS1[1:8]
Mindspeed Technologies
Name
Name
Transmit path trace circular buffer.
Transmit value for S1 overhead byte.
Path 1
Path 2
Path 3
Path 4
™
0x0AC
0x0EC
0x12C
0x16C
Description
Description
4.1 Memory Map
4.0 Registers
4-65