VSC6134
Datasheet
The LOH monitor block I/O is described in the following table.
Table 1.
LOH Monitors I/O Description
Name
Direction
Function
RESET_N
CLK
IN
IN
IN
Active low reset.
155 MHz system clock.
DATAI[63:0]
155 Mbps input data bus (after descrambling). DATAI is clocked in on
rising edge of CLK.
ROWCNT[3:0]
COLCNT[6:0]
SETCNT[4:0]
LOHM_EN
IN
IN
IN
IN
Rx STS-192/STM-64 frame row counter (rows 0 to 8).
Rx STS-192/STM-64 frame column counter (columns 0 to 89).
Rx STS-192/STM-64 frame set counter (sets 0 to 23).
Active high LOH monitor enable signal. If active, the data bus is
disabled.
SEF
IN
IN
Active high severely-errored-frame alarm indicator.
Active high signal indicating loss-of-signal alarm.
Active high signal indicating loss-of-frame alarm.
Performance monitor one-second clock.
LOS
LOF
IN
CLOCK_1S
B2BITFRM_CNT[10:0]
IN
OUT
B2 bit error count per frame for BER monitor in SOHM, M0,M1 bytes in
the transmit path and overhead extraction block.
B2BLKFRM_CNT[7:0]
B2ERRFRM_EN
OUT
OUT
B2 block error count per frame for overhead extraction block.
Active high enable signal. Mark the valid B2BLKFRM_CNT and
B2BITFRM_CNT.
MPU_CLR_RD_WRN
IN
Control signal indicating whether the status registers are cleared on
read or on write.
MPU_CLK
IN
IN
Microprocessor clock.
MPU_RESETN
Active low MPU_CLK reset.
MPU_RDENA
IN
Microprocessor read enable signal.
Microprocessor write enable signal.
Microprocessor address bus.
MPU_WRENA
IN
MPU_ADDR[15:0]
MPU_WDATA[15:0]
MPU_LOHM_RDATA[15:0]
MPU_LOHM_DTK
MPU_LOHM_INT
MPU_LOHM_SEL
MPU_SAT_ROLLOVERN
MPU_LOHM_INITDONE
IN
IN
Microprocessor write data bus.
OUT
OUT
OUT
IN
Microprocessor read data bus.
Microprocessor data acknowledgement pulse.
Microprocessor block interrupt.
Microprocessor block select for LOH monitor.
Control signal indicating whether the counters saturate or rollover.
IN
OUT
Active high memory initialization complete indicator. After reset, every
memory block goes through an initialization sequence and the signal is
asserted on completion.
AIS_L_OUT
OUT
AIS_L alarm signal, passed to TX path in the same and opposite
direction.
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VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
