QST108AM1 datasheet(24/51 Pages) STMICROELECTRONICS

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Device operating modes

QST108

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Error codes

Table 11 lists the I2C error codes.

KeyError byte description

Key state (Bit 7)

When set to ‘1’, the corresponding key is touched. This bit is always cleared for the

GET_KEY_STATE command.

Key error codes (Bits 2:0)

When answering the GET_KEY_STATE command, the key error code corresponds to

the error codes of all the keys ORed toghether. When answering the

GET_KEY_ERROR command, each key error code describes the errors of one defined

key.

Bit 0: When set to ‘1’, calibration in progress

Bit 1: When set to ‘1’, maximum count reached

Bit 2: When set to ‘1’, minimum count not reached

All key state description

Key n state

When set to ‘1’, the corresponding key is touched.

Table 11.

ErrCode

Description

0x01

No Error

0x83

Command not supported

0x85

Parameter not supported

0xA1

Parity Error

0xA3

Checksum Error

0xE0

Initialization process (GET_FIRMWARE_INFO command not received)

Table 12.

KeyError byte description

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Key State

Key error codes

Table 13.

AllKeyState

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Key 8 State Key 7 State Key 6 State Key 5 State Key 4 State Key 3 State Key 2 State Key 1 State

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