QST108

Device operating modes

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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)

Key error code describes the errors in the system on all keys.

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.

Key activation description

Key activation (Bit 7)

0: Key enabled

1: Key disabled

Key identifier (Bits 3:0)

0000: All keys

0101: Key 5

0001: Key 1

0110: Key 6

0010: Key 2

0111: Key 7

0011: Key 3

1000: Key 8

0100: Key 4

Table 12.

KeyError byte description

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Key State

0

0

0

0

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

Table 14.

KeyActivation

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Key

Activation

0

0

0

Key ID (binary coded)