DS3134 datasheet(70/203 Pages) DALLAS

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DS3134

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5.5 BERT

The BERT Block is capable of generating and detecting the following patterns:

- The pseudorandom patterns 2E7, 2E11, 2E15, and QRSS

- A repetitive pattern from 1 to 32 bits in length

- Alternating (16-bit) words which flip every 1 to 256 words

The BERT receiver has a 32-bit Bit Counter and a 24-bit Error Counter. It can generate interrupts on

detecting a bit error, a change in synchronization, or if an overflow occurs in the Bit and Error Counters.

See Section 4 for details on status bits and interrupts from the BERT Block. To activate the BERT Block,

the Host must configure the BERT mux (see Figure 5.5A) and in channelized applications, the Host must

also configure the Layer One State Machine to send/obtain data to/from the BERT Block via the Layer

One Configuration Registers (see Section 5.3).

BERT Mux Diagram Figure 5.5A

Port 0 (slow)

Port 1 (slow)

Port 2 (slow)

Port 3 (slow)

Port 4 (slow)

Port 5 (slow)

bertbd

BERT

Mux

BERT

Block

SBERT Status Bit

in SM

Internal Control &

Configuration Bus

Port 13 (slow)

Port 14 (slow)

Port 15 (slow)

Port 0 (fast)

Port 1 (fast)

BERT Select (5)

In the Master Configuration

DS3134 データシート(PDF) 70 Page - Dallas Semiconductor

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