TMPR28051 datasheet(55/90 Pages) AGERE

55 / 90 page

Data Sheet

August 1999

TMPR28051 STS-1/AU-3 (STM-0) Mapper

Lucent Technologies Inc.

Microprocessor Interface Description (continued)

Table 15. Registers 0x00—0x16: Device-Level Control, Alarm, and Mask Bits (continued)

Address

(Hex)

Bit #

Name

Function

Reset

Default

(Hex)

0x05

—

The bits in register 0x05 are used to report problems at the

receive DS1/E1 and VT level. The bits in this register are

composite bits. The bits that report the problems at the VT

level are located in 28 separate registers (one for each VT)

as described below. These composite bits are placed in the

detected. When any one of the 28 VT bits indicates an

error, the corresponding composite bit indicates an error.

0x00

ESOFCOM

ESOFCOM = 1 reports that the device has experienced

either a receive or a transmit elastic store overflow. This is

an event bit and is held until read.

VTSIZECOM

VTSIZECOM = 1 reports incorrect VT size bits. The valid

VT size bits are 11 for VT1.5 and 10 for VT2.

VTLOPCOM

VTLOPCOM = 1 reports LOP-V.

VTRFIRDICOM

VTRFIRDICOM = 1 reports the fact that the VT RFI/RDI

bits have been received as a new consistent value for three

consecutive superframes. This is an event bit and is held

until read.

VTAISCOM

VTAISCOM = 1 reports the fact that the V1 and V2 pointer

bytes are all 1s for three consecutive superframes.

VTLABCOM

VTLABCOM = 1 reports change of state of the VT label. In

order for this bit to be set, the device must detect three

consecutive consistent new values for the VT label. This is

an event bit and is held until read.

AISLOCCOM

AISLOCCOM = 1 reports an AIS or LOC condition on DS1/

E1. This is a current state bit with a minimum persistence

of 2 ms. The indications reset if the condition is no longer

true.

STS1LOS

STS1LOS = 1 reports an STS-1 loss of signal. The bits in

periods required to declare received STS-1 loss of signal. If

this value is 0x00, then STS1LOS is not declared. This is a

current state bit with a minimum persistence of 250

µs. The

indications reset if the condition is no longer true.

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