STMPE812ABJR STMicroelectronics, STMPE812ABJR Datasheet - Page 21

• 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

STMPE812A
8
Interrupt system
The STMPE812A uses a 2-tier interrupt structure. In normal mode, interrupts from the GPIO
and touchscreen controller assert the INT pin and are available in the Interrupt Status
register (ISR).
In pen down mode, the INT pin is asserted as long as pen down is detected.
Since the INT pin is a OR function of the pen down and all other enabled interrupts, in order
for INT pin to provide the exclusive indication of pen down (INT = Low) and pen up
(INT = High), as such benefit from minimal I
down mode when the GPIO/PWM/ADC functions are not required or the GPIO/PWM/ADC
interrupts are disabled.
Figure 7.
Interrupt system diagram
Doc ID 18225 Rev 4
2
C transactions, it is recommended to use pen
Interrupt system
21/53