STMPE811_V01 datasheet(8/66 Pages) STMICROELECTRONICS

Part #	STMPE811

Description	S-Touch® advanced resistive touchscreen controller with 8-bit GPIO expander

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Pin configuration and functions

STMPE811

8/66

Doc ID 14489 Rev 5

2.1

Pin functions

The STMPE811 is designed to provide maximum features and flexibility in a very small pin-

count package. Most of the pins are multi-functional. Table 3 and Table 4 show how to select

the pin’s function.

Table 3.

Pin configuration for IN2, IN3

Pin / control

register

GPIO_AF = 1

GPIO_AF = 0

ADC control 1 bit 1 =

don’t care

ADC control 1 bit 1 = 0

ADC control 1 bit 1 = 1

IN0

GPIO-0

ADC

IN1

GPIO-1

ADC

IN2

GPIO-2

ADC

External reference +

IN3

GPIO-3

ADC

External reference -

Table 4.

Pin configuration for X+, Y+, X-, Y-

Pin / control

register

GPIO_AF = 1

GPIO_AF = 0

TSC control 1 bit 0 =

don’t care

TSC control 1 bit 0 = 0

TSC control 1 bit 0 = 1

X+

GPIO-4

ADC

TSC X+

Y+

GPIO-5

ADC

TSC Y+

X-

GPIO-6

ADC

TSC X-

Y-

GPIO-7

ADC

TSC Y-

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STMPE811 Datasheet(PDF) 8 Page - STMicroelectronics

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