STMPE321 ST Microelectronics, STMPE321 Datasheet - Page 16

• Manufacturer Part Number: STMPE321
• Description: 3-channel capacitive touch key controller
• Manufacturer: ST Microelectronics

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System and identification registers
16/40
Table 7.
Operational
(6.5 MHz)
Autosleep
(200 kHz)
[2] GPIO CLOCK DISABLE:
[1] FIFO CLOCK DISABLE:
[0] TOUCH CLOCK DISABLE:
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 setting
Divider
16
16
1
2
4
8
1
2
4
8
Doc ID 15791 Rev 1
Sensor clock
[2:0]
000
001
010
011
000
001
010
011
1xx
1xx
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
Calibration
12.5 kHz
6.25 kHz
100 kHz
3.2 kHz
1.6 kHz
50 kHz
25 kHz
800 Hz
400 Hz
200 Hz
STMPE321