cx28250 Mindspeed Technologies, cx28250 Datasheet - Page 5

• Manufacturer Part Number: cx28250
• Description: Cx28250 Atm Physical Interface Phy Devices
• Manufacturer: Mindspeed Technologies

Line Interface (continued)
• PMD (line) and Framer (source) loopbacks for diagnostic
• Loss of Signal (LOS) detection
• 19.44 MHz reference clock
SONET STS-3c/STM-1 Framer
Section Overhead Octets Supported
Line Overhead Octets Supported
Path Overhead Octets Supported
28250-DSH-002-C
A1/A2
J0
Z0
B1
D1, D2, D3
H1/H2
H3
B2
K1/K2
D4-D12
S1
M1
J1
B3
C2
G1
Z2
testing
1
, Z0
2
F6/28 hex or disable 00
01 hex or 64-byte trace buffer
02, 03 hex/user defined
Calculated, error insertion
00 hex or external data link
620A/93FF hex pointer
Set to 00
Calculated, error insertion
Insertable via register
00 hex or external data link
Insertable via register
Line
00 hex or 64-byte trace buffer
Calculated, error insertion
13 hex for ATM mapping
Path
REI
REI
, RDI inserted
inserted
Transmit
Transmit
Transmit
Mindspeed Technologies
UTOPIA Level 2 Interface
• PHY cell to UTOPIA interface
• 50 MHz maximum data rate
• 8/16-bit data path interface
• Multi-PHY support
• Mode-compatible with UTOPIA level 1
• Configurable cell buffer depth
External data link
Full GR.253 pointer processor
Used in pointer processor
Checked, interrupt on change
External data link
Checked, interrupt on change
Checked, errors counted
Checked for 01 or 13 hex
Checked, errors counted, status
Monitored
Monitor out of frame state machine
Monitor Rx trace buffer, interrupt on change
Not checked
Checked, errors counted
Checked, errors counted
Monitor Rx trace buffer, interrupt on change
Checked, errors counted
™
Receive
Receive
Receive