STMPE321 datasheet(16/40 Pages) STMICROELECTRONICS

Nome de Peças	STMPE321

Descrição Electrónicos	3-channel capacitive touchkey controller

PDF	40 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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16 / 40 page

System and identification registers

STMPE321

16/40

Doc ID 15791 Rev 3

SYS_CFG_2

System configuration 2

Address:

0x04

Type:

R/W

Reset:

0xEF

Description:

This register enables the switching off of the clock supply

543

SENSOR

CLOCK 2

SENSOR

CLOCK 1

SENSOR

CLOCK 0

RESERVED

GPIO CLOCK

DISABLE

FIFO CLOCK

DISABLE

TOUCH CLOCK

DISABLE

[7:5] SENSOR CLOCK: See description in Table 7.

[4] RESERVED

[3] RESERVED

[2] GPIO CLOCK DISABLE:

Write ‘1’ to disable the clock to GPIO unit.

[1] FIFO CLOCK DISABLE:

Write ‘1’ to disable the clock to FIFO unit. This must be set to ‘0’ if touch interrupt is required.

[0] TOUCH CLOCK DISABLE:

Write ‘1’ to disable the clock to TOUCH unit.

Table 7.

Sensor clock setting

Mode

Divider

Sensor clock

[2:0]

Active

Calibration

Operational

(6.5 MHz)

000

12.8 kHz

100 kHz

001

6.4 kHz

50 kHz

010

3.2 kHz

25 kHz

011

1.6 kHz

12.5 kHz

1xx

800 Hz

6.25 kHz

Autosleep

(200 kHz)

000

400 Hz

3.2 kHz

001

200 Hz

1.6 kHz

010

100 Hz

800 Hz

011

50 Hz

400 Hz

1xx

25 Hz

200 Hz

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