STMPE821QTR STMicroelectronics, STMPE821QTR Datasheet - Page 24
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STMPE821QTR
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STMPE821QTR
Manufacturer:
STM
Quantity:
1 261
GPIO controller
7
24/55
IO-7
7
7
GPIO controller
A total of 8 GPIOs are available in the STMPE821. The GPIO controller contains the
registers that allow the host system to configure each of the pins into either a GPIO, direct
output of a TOUCH channel or a PWM output. Unused GPIOs should be configured as
outputs to minimize the power consumption.
A group of registers is used to control the exact function of each of the 8 GPIOs. The
registers and their respective address is listed in the following table.
Table 8.
All GPIO registers are named as GPxx, where:
Xxx represents the functional group
For LSB registers:
For MSB registers:
IO-6
6
6
Address
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
GPIO controller registers summary map
IO-5
5
5
IO-4
GPIO_FUNCT_MSB
GPIO_FUNCT_LSB
4
4
GPIO_SET_MSB
GPIO_SET_LSB
GPIO_DIR_MSB
GPIO_MR_MSB
GPIO_DIR_LSB
GPIO_MR_LSB
Register name
RESERVED
IO-3
3
3
GPIO monitor pin state
register
GPIO set pin state
register
GPIO set pin direction
register
GPIO function register
IO-2
2
2
Description
IO-1
1
1
Auto-increment
YES
YES
YES
YES
STMPE821
IO-0
0
0