STMPE321QTR STMicroelectronics, STMPE321QTR Datasheet - Page 23

• Manufacturer Part Number: STMPE321QTR
• Description: IC CTLR TOUCH KEY 3CH 12-QFN
• Manufacturer: STMicroelectronics
• Series: S-Touch™r
• Type: Capacitiver

Specifications of STMPE321QTR

• Number Of Inputs/keys: 3 Key
• Resolution (bits): 8 b
• Data Interface: I²C
• Data Rate/sampling Rate (sps, Bps): 100k
• Voltage - Supply: 1.65 V ~ 1.95 V
• Mounting Type: Surface Mount
• Package / Case: 12-QFN
• Voltage Supply Source: Single Supply
• Resolution: 7 bit to 10 bit
• Interface Type: I2C
• Supply Voltage (max): 1.95 V
• Supply Voltage (min): 1.65 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Sampling Rate (per Second): -
• Lead Free Status / Rohs Status: Details
• Other names: 497-8985-2

STMPE321
The function of each bit is shown
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.
'1' sets the corresponding GPIO to function as GPIO, and '0' sets it to
touchkey mode.
Doc ID 15791 Rev 3
inTable
9:
Function
GPIO controller
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