STMPE812ABJR STMicroelectronics, STMPE812ABJR Datasheet - Page 16

• Manufacturer Part Number: STMPE812ABJR
• Description: Touch Screen Converters & Controllers Touchscreen cntrlr S-Touch
• Manufacturer: STMicroelectronics
• Type: Resistive Touch Controllersr

Specifications of STMPE812ABJR

• Rohs: yes
• Input Type: 1 TSC
• Data Rate: 400 kbps
• Resolution: 12 bit
• Interface Type: 4-wire, I2C
• Supply Voltage: 1.65 V to 3.6 V
• Supply Current: 100 uA
• Operating Temperature: - 40 C to + 85 C
• Package / Case: CSP-12
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.65 V

Power modes
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Figure 6.
On power up reset, device goes to active state. However, as all the functional blocks are
clocked off by default, no touch/hotkey activity is possible. If there are no I
device goes into auto-hibernate mode automatically.
The auto-hibernate feature of STMPE812A is always enabled. Whenever there is a period of
inactivity, the device enters this mode to reduce power consumption. On detection a touch,
correctly addressed I
As the device is able to wake up very quickly, there is no loss of touch data.
STMPE812A is in
active mode if PWM
is running
Power modes state diagram
ACTIVE
2
(about 33 μs)
C data, GPIO activity, the device wakes up immediately.
No activity
Doc ID 18225 Rev 4
Soft -Reset, Reset input
I2C activity,
Touch, Hotkey
HIBERNATE
AUTO -
Reset Input
POR
2
C activities,
STMPE812A
AM04141V1