PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 415

• Manufacturer Part Number: PM5380-BI
• Description: Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
14.6 Receive Data Communication Channels
Figure 44 Transmit Line Data Link Clock and Data Insertion
The Transmit Section Data Link Clock and Data Insertion diagram (Figure 45) shows the
relationship between the TDCC serial data input, and its associated TDCLK. In this mode,
TDCLK is a 216 kHz, 50% duty cycle clock that is gapped to produce a 192 kHz nominal rate.
TDCC is sampled on the rising edge of TDCLK. The D1-D3 bytes shifted in to the S/UNI-
8x155 in the frame shown are inserted in the corresponding transport overhead channels in the
next frame.
Figure 45 Transmit Section Data Link Clock and Data Insertion
The SUNI-8x155 provides access to Line or Section Data Communications Channels (DCC).
The RDCC[7:0] with their clocks RDCLK[7:0] provide either the section or line DCC channels
based on the DCCSEL[7:0] registers.
The Receive Line Data Link Clock and Data Extraction Timing diagram (Figure 46) shows the
relationship between the RDCC serial data output and its associated RDCLK when configured
for line DCC. In this mode, RDCLK is a 2.16 MHz, 67%(high)/33%(low) duty cycle clock that
is gapped to produce a 576 kHz nominal rate. RDCC is updated on the falling edge of RDCLK.
The D4-D12 bytes shifted out of the S/UNI-8x155 in the frame shown are extracted from the
corresponding transport overhead channels in the previous frame.
TDCLK
TDCLK
TDCLK
TDCC
TDCC
TDCC
1
1
B1
B1
B2
B2
B3
B3
B4
B4
B5
B5
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
B6
B6
B7
B7
125 MICROSECONDS
125 MICROSECONDS
B8
B8
B1
B1
B2
B2
B3
B3
APPROX. 2MHZ CLOCK BURST
B4
B4
B5
B5
B6
B6
B7
B7
B8
B8
B1
B1
B2
B2
B3
B3
B4
B4
Released
B5
B5
415
B6
B6
B7
B7
B8
B8
B
B