Pin Descriptions Grouped by Function
41
SONET OC-12 Transceiver Interface Configuration
SONET Optical Carrier (OC) 12 is implemented by using one cluster of CPs. At any time, a
CP within a cluster spends half its time performing receive functions, and the other half
performing transmit functions. Table 14 shows a CP Cluster configured for one OC-12
interface.
Table 14 OC-12 Signals Example
SIGNAL NAME*
PIN #†
TOTAL TYPE
I/O
LABEL
SIGNAL DESCRIPTION
CPn_0
Table 7
1
LVTTL
OPD
TCLK
Deskewed Transmit Clock (77.76MHz). This clock is used to
synchronize the transmit data.
CPn_1
Table 7
1
LVTTL
IPU
TCLKI
Transceiver Transmit Clock. This clock sets the frequency of the
transmit data and is typically sourced by the PHY chip.
CPn_2
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
Table 7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
LVTTL
LVTTL
LVTTL
LVTTL
LVTTL
nc
OPD
OPU
OPD
OPU
OPU
TXD(0)
TXD(1)
TXD(2)
TXD(3)
00F
Transmit Data (byte-wide data, least significant bit)
CPn_3
Transmit Data
CPn_4
Transmit Data
CPn_5
Transmit Data
CPn_6
Out of Frame
CPn+1_0
CPn+1_1
CPn+1_2
CPn+1_3
CPn+1_4
CPn+1_5
CPn+1_6
CPn+2_0
CPn+2_1
CPn+2_2
CPn+2_3
CPn+2_4
CPn+2_5
CPn+2_6
ncPD nc
ncPU nc
nc
nc
nc
LVTTL
LVTTL
LVTTL
LVTTL
nc
OPD
OPU
OPD
OPU
TXD(4)
Transmit Data
TXD(5)
TXD(6)
TXD(7)
Transmit Data
Transmit Data
Transmit Data (byte-wide data, most significant bit)
ncPU nc
ncPD nc
nc
nc
nc
LVTTL
LVTTL
LVTTL
LVTTL
LVTTL
LVTTL
IPU
IPD
IPU
IPD
IPU
IPU
RCLK
Receive Clock (77.76MHz)
RXD(0)
RXD(1)
RXD(2)
RXD(3)
FP
Receive Data (byte-wide receive data, least significant bit)
Receive Data
Receive Data
Receive Data
Frame Synchronization Pulse. This is valid during the third A2 of
the receive SONET frame.
CPn+3_0
Table 7
1
nc
ncPD nc
nc
03
FREESCALE [ Freescale ]
