STM8T141 STMicroelectronics, STM8T141 Datasheet - Page 18

• Manufacturer Part Number: STM8T141
• Description: Single-channel capacitive sensor for touch or proximity detection with shielded sensing electrode
• Manufacturer: STMicroelectronics

Device operation
7
7.1
Note:
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Device operation
The STM8T141 can be configured through a set of 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
The STM8T141 can be configured to act as a touch or proximity detection device. A number
of other options are also user programmable, including:
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●
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Option byte description
A set of tools is supplied by STMicroelectronics to program the user OTP options for
prototyping purposes. Please refer to
details.
Devices that are not yet programmed (“blank” devices) are delivered cleared (at value ‘0’) for
all bits.
Table 5.
The user options allow the STM8T141 to be customized for each specific application.
Default values for the oscillator, conversion rate (t
settings should be used initially for first designs.
Option
OPT1
OPT0
byte
no.
Four output modes
–
–
–
–
TOUT/POUT output mode selection
Four detection thresholds
–
–
Four power modes
–
–
Reference freeze timeout
Active mode
Toggle mode
3-second Latch mode
30-second Latch mode
Two for touch detection
Two for proximity detection
Normal power mode
Three low power modes
Bit 7
Power mode
Option bytes
Bit 6
information).
Reserved
Detection threshold
Bit 5
Doc ID 15699 Rev 7
Section 12: STM8T141 development tools
Bit 4
Option bits
Reference freeze
Bit 3
SAMPLING
timeout
Sampling
period
Bit 2
), filter freeze and device reset
frequency
transfer
Charge
Bit 1
TOUT/POUT
output mode
Reserved
Bit 0
STM8T141
for more
Factory
default
setting
0xX0
0x00