AT43USB326 datasheet(85/102 Pages) ATMEL

tên linh kiện	AT43USB326

Giải thích chi tiết về linh kiện	Multimedia USB Keyboard Controller with Embedded Hub

PDF	102 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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85 / 102 page

AT43USB326

3313D–USB–04/06

Address locations 0x04 through 0x6E store the VID, PID, Release Number and String

Descriptors if they are enabled by the mask bits in location 0x03. The data are stored sequen-

tially as described below:

Initial Check Byte

This check byte is located immediately after the last VID, PID or stings. It is computed as the

truncated sum of Mask1 and all the string length specified.

Keyboard Matrix

The keyboard matrix is 144 bytes. If specified, its check byte is located in address 0x6F while

the matrix itself is located from address 0x70 - 0xFF.

0x70 = Col 0, Row 0

0x71 = Col 0, Row 1

.......

0x78 = Col 1, Row 0

0x79 = Col 1, Row 1

.....

0xF8 = Col 17, Row 0

0xF9 = Col 17, Row 1

.....

0xFF = Col 17, Row 7

Example of

SEEPROM Data

Table 26 through Table 34 illustrate the contents of a SEEPROM for a typical AT43USB326-

based keyboard.

Table 24. VID and PID

VID

Byte 1

VID

Byte 2

PID

Byte 1

PID

Byte 2

Release #

Byte 1

Release #

Byte 2

Check

Byte

Table 25. Language ID and Strings

Length (N)

Byte 1

Byte 2

Byte N - 1

Check Byte

Table 26. Preamble

Address

Data

Description

Fixed ID

Reserved

Mask bits

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