cx29600 Mindspeed Technologies, cx29600 Datasheet - Page 69

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

CX29600
CX29600 Data Sheet
Figure 2-16. J0 Buffer Behavior
29600-DSH-001-B
NOTE(S): The Receive buffer functions in the opposite direction.
0x58, octet 0
.
.
.
2.4.2.3 J0, Z0
octet 54
octet 55
octet 56
octet 57
octet 58
octet 59
octet 60
octet 61
octet 62
octet 63
octet 1
octet 2
octet 3
octet 4
String to be transmitted: 00 01 02 03 04 05 06 07 08 09 0A ... 3B 3C 3D 3E 3F
.
.
.
State of the J1 buffer
after the 1st frame
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
05
The Section Trace byte, J0, is connected to a circular 64-byte buffer that carries
the Section Trace message. This enables section elements to track a continuous
connection.
TXSEC register is set to 1, the device will read the next location from the
TXSECBUF and transmit it in the J0 octet. Note that the contents of the
TXSECBUF are undefined on power up.
circular buffer that overwrites when full. If the incoming message differs from the
previous message, the SecTraceInt bit in the SECINT register will be asserted.
the frame (02, 03, 04, etc.). The received Z0 octet is not monitored.
By default, the transmitted J0 octet contains 0x01. If the EnSecTr bit in the
The incoming J0 octets are written to the RXSECBUF register. This is also a
The Z0 octet is set to the value corresponding to its order of appearance within
Mindspeed Technologies
State of the J1 buffer
after the 2nd frame
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
05
06
State of the J1 buffer
after the 3rd frame
Transmitter was at this point in the string when
the receiver obtained frame alignment.
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
undefined
2.4 SONET/SDH Framer and Overhead Processor
™
05
06
07
Figure 2-16
illustrates this.
2.0 Functional Description
State of the J1 buffer
after the 64th frame
3C
3D
05
06
07
08
09
3B
3E
3F
00
01
02
03
04
2-25