STMPE821QTR STMicroelectronics, STMPE821QTR Datasheet - Page 25

• Manufacturer Part Number: STMPE821QTR
• Description: IC CTLR TOUCH KEY 8CH CAP 16-QFN
• Manufacturer: STMicroelectronics
• Type: Capacitiver

Specifications of STMPE821QTR

• Number Of Inputs/keys: 8 Key
• Data Interface: I²C
• Voltage - Supply: 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Voltage Supply Source: Single Supply
• Resolution: 7 bit to 10 bit
• Interface Type: I2C
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Channels: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Resolution (bits): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8826-2

STMPE821
The function of each bit is shown in the following table:
Table 9.
GPIO monitor pin state
GPIO set pin state
GPIO set pin direction
GPIO function
Register name
GPIO control bits function
Reading this bit yields the current state of the bit. Writing has no
effect.
Writing '1' to this bit causes the corresponding GPIO to go to '1' state
Writing '0' to this bit causes the corresponding GPIO to go to '0' state
'0' sets the corresponding GPIO to input state, and '1' sets it to output
state. All bits are '0' on reset. The GPIO must be set as output if the
PWM on this pin is to be used.
'1' sets the corresponding GPIO to function as GPIO/PWM, and '0'
sets it to touch key mode.
For GPIO 0-3, if the GPIO function is set to GPIO/PWM mode and the
AF bits in the PWM master enable register is enabled, the
corresponding GPIO will function as PWM output.
Doc ID 14478 Rev 5
Function
GPIO controller
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