DP83256 datasheet(52/144 Pages) NSC

tên linh kiện	DP83256

Giải thích chi tiết về linh kiện	PLAYERa??Device (FDDI Physical Layer Controller)

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50 Registers (Continued)

58 INJECTION SYMBOL REGISTER B (ISRB)

The Injection Symbol Register B along with Injection Symbol Register A contains the programmable value (already in 5B code)

that will replace the data symbol pairs

In One Shot mode ISRA and ISRB are injected n bytes after a JK where n is the programmed value of the Injection Threshold

Register In the Periodic mode ISRA and ISRB are injected every n-th symbol pair In the Continuous mode all data symbols are

replaced with ISRA and ISRB

ACCESS RULES

ADDRESS

READ

WRITE

07h

Always

RES

IJS9

IJS8

IJS7

IJS6

IJS5

Bit

Symbol

Description

D0 – D4

IJS0 – IJS4

INJECTION SYMBOL BITk0-4l

Symbol to be injected

IJS0 is the Least Significant Bit (LSB) and goes out onto the media last

D5 – D7

RES

RESERVED

Reserved for future use

Note

Users are discouraged from using these bits The reserved bits are set to 0 during the reset process They may be set or cleared

without any effects to the functionality of the PLAYERa device

DP83256 bảng dữ liệu(PDF) 52 Page - National Semiconductor (TI)