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STMPE812 Dataheets PDF



Part Number STMPE812
Manufacturers ST Microelectronics
Logo ST Microelectronics
Description Enhanced 4-wire resistive touchscreen controller
Datasheet STMPE812 DatasheetSTMPE812 Datasheet (PDF)

STMPE812 S-Touch® enhanced 4-wire resistive touchscreen controller with PWM Features ■ 4 GPIOs (8 mA drive, 12 mA sink at 3.3 V) ■ 1 additional, general purpose 12-bit ADC ■ Operating voltage 1.65 - 3.6 V t(s) ■ Integrated 4-wire touchscreen controller, pendown/real-time mode, fully-autonomous uc ■ 1 PWM controller d ■ Auto-hibernation and low power ro – Typ 0.5 µA in Hibernation mode P – Typ 100 µA in Active mode te ■ Interrupt output pin (optional) le ■ Reset input pin (optional) so ■ Wake.

  STMPE812   STMPE812



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STMPE812 S-Touch® enhanced 4-wire resistive touchscreen controller with PWM Features ■ 4 GPIOs (8 mA drive, 12 mA sink at 3.3 V) ■ 1 additional, general purpose 12-bit ADC ■ Operating voltage 1.65 - 3.6 V t(s) ■ Integrated 4-wire touchscreen controller, pendown/real-time mode, fully-autonomous uc ■ 1 PWM controller d ■ Auto-hibernation and low power ro – Typ 0.5 µA in Hibernation mode P – Typ 100 µA in Active mode te ■ Interrupt output pin (optional) le ■ Reset input pin (optional) so ■ Wake-up feature on each port configured as b GPIO input - O ■ I2C interface ) ■ 8 kV HBM, 1 kV CDM ESD protection on t(s X+/X-/Y+/Yc ■ 2 kV HBM, 250 V CDM ESD protection on all du other pins Pro Applications te ■ Portable media players le ■ Game consoles Obso ■ Mobile and smart phones Flip-chip CSP12 (2.17 x 1.67 mm) Description The STMPE812 is a 4-wire resistive touchscreen controller with 4-bit port expander integrated. The touchscreen controller is designed to be fully autonomous, requiring only minimal CPU intervention for sampling, filtering and preprocessing operations. Table 1. Device summary Order code STMPE812BJR Package Flip-chip CSP12 (2.17 x 1.67 mm) February 2011 Doc ID 17732 Rev 3 Packaging Tape and reel 1/51 www.st.com 51 Contents Contents STMPE812 1 STMPE812 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Pin configuration and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 I2C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 I2C features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 t(s) 2.3 Read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 c 2.4 Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 rodu 3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 te P 4 Charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 sole 5 Power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 - Ob 6 STMPE812 registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 t(s) 6.1 Auto-increment/non auto-increment address . . . . . . . . . . . . . . . . . . . . . . 16 uc 7 System and identification registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Prod 8 Interrupt system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 lete 9 ADC controller . . . . . . . . . . ..


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