VT5363(2006) 데이터 시트보기 (PDF) - STMicroelectronics

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VT5363
(Rev.:2006)

Single-chip USB/PS2 optical mouse

STMicroelectronics 

Configuring the VT5363

VT5363

3.5

EEPROM data format

A 128 byte serial EEPROM is used to hold USB configuration information. The lower 64

bytes hold USB PID, VID and string information as shown in the table below. The upper

bytes may be used to hold special setup information, for example to set the resolution to

400cpi (contact STMicroelectronics for details).

Location 127 in the EEPROM must hold the number 0xAA and is used to detect that an

EEPROM has been fitted. If location 127 does not contain 0xAA the EEPROM contents will

be ignored.

Table 4. Example EEPROM contents

EEPROM

Location

Contains

Notes

0

VID (LSB)

1

VID (MSB)

2

PID (LSB)

3

PID (MSB)

4

PID (LSB)

5

PID (MSB)

6

PID (LSB)

7

PID (MSB)

8

0x04

9

0x03

10

0x09

11

0x04

12

0x0C

13

14

15

16

17

18

19 - 62

0x03

0x4D

0x4F

0x55

0x53

0x45

0xFF

64-126 0xFF

127

0xAA

Vendor ID

(only one VID is stored for all 3 mouse configurations)

Product ID for 2 button mouse

Product ID for ‘3 button + Z’ mouse

Product ID for ‘5 button + Z’ mouse

Language ID Length

Language ID Type

Language ID (2 bytes)

(0x0904 = US English)

String ID Length = (number of characters in string *2) + 2

For the example string ‘MOUSE’ this is (2*5)+2 = 12 = 0x0C

String ID Type

ASCII code for first character of String (example for ‘M’)

ASCII code for first character of String (example for ‘O’)

ASCII code for first character of String (example for ‘U’)

ASCII code for first character of String (example for ‘S’)

ASCII code for first character of String (example for ‘E’)

Rest of lower half of EEPROM is available for longer strings, up

to 50 characters maximum (set unused locations to 0xFF)

Leave upper half of EEPROM empty

(may be used to hold special setup information - contact

STMicroelectronics for details)

Special flag to indicate that EEPROM is present

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