STMPE821QTR STMicroelectronics, STMPE821QTR Datasheet - Page 14

• 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

Register map and function description
4
14/50
Register map and function description
This section lists and describes the registers of the STMPE821 device, starting with a
register map and then provides detailed descriptions of register types.
Table 5.
Address
0x30 -
0x0C
0x0D
0x0A
0x0B
0x0E
0x2A
0x00
0x01
0x02
0x03
0x04
0x08
0x09
0x10
0x12
0x14
0x16
0x18
0x20
0x21
0x22
0x23
0x25
0x26
0x27
0x28
0x29
0x37
CHIP_ID_0
CHIP_ID_1
ID_VER
SYS_CFG_1
INT_CTRL
INT_EN
INT_STA
GPIO__INT_EN_lsb
GPIO__INT_EN_msb
GPIO_INT_STA_lsb
GPIO_INT_STA_msb
GPIO_SET
GPIO_DIR
GPIO_FUNCT
TOUCH_FIFO
FEATURE_SEL
ETC_WAIT
CAL_INTERVAL
INTEGRATION_
TIME
CTRL
INT_MASK
INT_CLR
FILTER_PERIOD
FILTER_THRESHOL
D
REF_DLY
TVR
SYS_CFG_2
GPIO_MR
Register summary map table
Register name
Doc ID 14478 Rev 5
Bit
64
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
Reset value
0xEF
0x08
0x21
0x0F
0x00
0x01
0x01
0x01
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x04
0x27
0x30
0x0F
0x00
0x08
0x00
0x00
0x00
0x00
0x08
Device identification
Device identification
Revision number
System configuration 1
System configuration 2
Interrupt control register
Interrupt enable register
Interrupt status register
GPIO interrupt enable register
GPIO interrupt enable register
GPIO interrupt status register
GPIO interrupt status register
GPIO monitor pin
GPIO set pin state register
GPIO set pin direction register
GPIO function register
Fifo access for touch data buffer
Feature selection
Wait time
Calibration interval
Integration time
Control
Interrupt mask
Interrupt clear
Filter period
Filter threshold
Reference delay
Touch variance setting
Function
STMPE821