Datasheet

Pin configuration and functions STMPE811
8/65 Doc ID 14489 Rev 6
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. Tabl e 3 and Tabl e 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-