stmpe610 STMicroelectronics, stmpe610 Datasheet - Page 46

• Manufacturer Part Number: stmpe610
• Description: Advanced Touch Screen Controller With 6-bit Port Expander
• Manufacturer: STMicroelectronics

GPIO controller
GPIO_FE
Address:
Type:
Reset:
Description:
GPIO_ALT_FUNCT
Address:
Type:
Reset:
Description:
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On power-up reset, all GPIOs are set as input.
Power supply
The STMPE610 GPIO operates from a separate supply pin (V
provides a level-shifting feature to the STMPE610. The GPIO remains valid until V
removed.
The host system may choose to turn off V
not allowed to turn off supply to V
The touch screen is always powered by V
above 2.8 V is advised.
Power-up reset (POR)
The STMPE610 is equipped with an internal POR circuit that holds the device in reset state,
until the V
0x16
R/W
0x00
Setting this bit to ‘1’ would enable the detection of the falling edge transition.
The detection would be reflected in the GPIO edge detect status register.
0x17
R/W
0x0F
Alternate function register. "‘0’ sets the corresponding pin to function as touch
screen/ADC, and ‘1’ sets it into GPIO mode.
IO
supply input is valid. The internal POR is tied to the V
Falling edge detection enable register
Alternate function register
IO
, while keeping the Vcc supplied.
cc
IO
. For better resolution and noise immunity, V
supply while keeping V
IO
). This dedicated supply pin
IO
IO
supply pin.
supplied. However it is
STMPE610
IO
is
IO