HC4GX15 Datasheet, PDF (435/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
1–171
SONET/SDH OC-12 Datapath
Figure 1–140 shows the transceiver datapath when configured in SONET/SDH OC-12
mode.
Figure 1–140. SONET/SDH OC-12 Datapath
Core
Fabric
TX Phase
Compensation
FIFO
wrclk
rdclk
tx_coreclk
tx_clkout
Core Fabric-Transmitter
Interface Clock
RX Phase
Compensation
FIFO
Transmitter Channel PCS
Low-Speed Parallel Clock
Receiver Channel PCS
Word
Aligner
Transmitter Channel PMA
Serializer
High-Speed
Serial Clock
Local
Clock
Divider
Receiver Channel PMA
De-
Serializer
CDR
rx_coreclk
rx_clkout
Core Fabric-Receiver
Interface Clock
Parallel Recovered Clock
SONET/SDH OC-48 Datapath
Figure 1–141 shows the transceiver datapath when configured in SONET/SDH OC-48
mode.
Figure 1–141. SONET/SDH OC-48 Datapath
Core
Fabric
TX Phase
Compensation
FIFO
wrclk
rdclk
tx_coreclk
tx_clkout
Core Fabric-Transmitter
Interface Clock
Transmitter Channel PCS
Byte
Serializer
wrclk
rdclk
/2
Low-Speed Parallel Clock
Transmitter Channel PMA
Serializer
Local
Clock
Divider
High-Speed
Serial Clock
Receiver Channel PCS Receiver Channel PMA
RX Phase
Compensation
FIFO
Byte
Ordering
Byte De-
serializer
Word
Aligner
De-
Serializer
CDR
rx_coreclk
rx_clkout
Core Fabric-Receiver
Interface Clock
/2
Parallel
Recovered Clock
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3