STM8T143 datasheet(26/65 Pages) STMICROELECTRONICS

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Device operation

STM8T143

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Device operation

The STM8T143 can be configured through a set of user-selectable one-time programmable

(OTP) option bytes. These options can be used in their default (unconfigured) state or set

for specific applications. For large orders, preconfigured devices are available (please refer

to Section 11: Ordering information).

The available options include:

•

Dual output, Control, or Data streaming mode

•

Output polarity

•

Touch and proximity detection thresholds

–

Eight selectable detection thresholds for touch detection

–

Four selectable detection thresholds for proximity detection

•

Control type

–

Halt conversion control

–

Reference freeze control

•

Reference freeze timeout

6.1

Option byte description

A set of tools is supplied by STMicroelectronics to program the user OTP options for

prototyping purposes. Please refer to Section 12: STM8T143 programming tool for more

details.

Note:

Devices which are not yet programmed (also called blank devices) are delivered with all bits

set to ‘0’.

Table 2. Option bytes

Option

byte

no.

Option bits

Factory

default

setting

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

OPT2

Reserved

Output

type(1)

Release

threshold

ratio

Gain target

Reserved

0x00

OPT1

Data

streaming

mode

Low power

mode

Reference freeze

timeout

Dynamic

calibration

delay

Reserved

Dual output/

Control mode

0x00

OPT0

Touch detection threshold

Proximity detection

threshold

Reserved

Output

polarity

Control type

0x00

1. Used only in Control mode.

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