VSC6134
Datasheet
4.2.7
SONET/SDH Serial Interface—Transmit Interface (Overhead Insert)
This section contains the SONET/SDH serial interface timing information for the transmit interface
(overhead insert).
Figure 83. Serial-Interface Transmit Data Timing
T
CLKP
T
CLKW
ADSDHOHCLK
DRSDHOHCLK
T
DFSO
ADRXSDHOHFS
DRRXSDHOHFS
T
T
HDI
SDI
ADTXSDHOHD
DRTXSDHOHD
Table 440. Transmit Interface
Symbol
TCLKP
TCLKW
TDFSO
TSDI
Parameter
Minimum
Typical
578.70
289.35
Unit
ns
Clock period
Clock pulse width
ns
Arrival before rising clock edge
Setup to rising clock edge
50
75
0
ns
ns
THDI
Hold to rising edge of the clock
ns
4.2.8
Microprocessor Interface Characteristics
The following table contains the general microprocessor interface timing information.
Table 441. General Microprocessor Interface Characteristics
Symbol
Parameter
Minimum
Maximum
Unit
MHz
MHz
TUP_CLK
Microprocessor clock frequency
16
50
25
TUP_CLK_DTK Microprocessor clock frequency in
synchronous modes using
DTK_TRI_PRG = 0
396 of 438
VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
