STMPE321QTR STMicroelectronics, STMPE321QTR Datasheet - Page 16

• 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

System and identification registers
SYS_CFG_2
Address:
Type:
Reset:
Description:
16/40
CLOCK 2
SENSOR
7
Table 7.
SENSOR
CLOCK 1
Operational
(6.5 MHz)
Autosleep
(200 kHz)
[7:5] SENSOR CLOCK: See description in
[4] RESERVED
[3] RESERVED
[2] GPIO CLOCK DISABLE:
[1] FIFO CLOCK DISABLE:
[0] TOUCH CLOCK DISABLE:
6
0x04
R/W
0xEF
This register enables the switching off of the clock supply
Write ‘1’ to disable the clock to GPIO unit.
Write ‘1’ to disable the clock to FIFO unit. This must be set to ‘0’ if touch interrupt is required.
Write ‘1’ to disable the clock to TOUCH unit.
Mode
SENSOR
CLOCK 0
Sensor clock setting
5
Divider
4
16
16
1
2
4
8
1
2
4
8
RESERVED
Doc ID 15791 Rev 3
3
Sensor clock
Table 7.
[2:0]
000
001
010
011
000
001
010
011
1xx
1xx
GPIO CLOCK
DISABLE
2
12.8 kHz
6.4 kHz
3.2 kHz
1.6 kHz
800 Hz
400 Hz
200 Hz
100 Hz
Active
50 Hz
25 Hz
System configuration 2
FIFO CLOCK
DISABLE
1
Calibration
TOUCH CLOCK
12.5 kHz
6.25 kHz
100 kHz
3.2 kHz
1.6 kHz
800 Hz
400 Hz
200 Hz
50 kHz
25 kHz
STMPE321
DISABLE
0