STMPE812 datasheet(17/51 Pages) STMICROELECTRONICS

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STMPE812

System and identification registers

Doc ID 17732 Rev 3

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System and identification registers

SYS_CTRL

System control register

Address:

0x03

Type:

R/W

Reset:

0x0F

Description:

System control register.

If the clock supply to a particular functional block is turned off, the registers of these

modules are not accessible.

Table 7.

System and identification registers map

Address

Bit

Type

Reset

Function

0x00 - 01

CHIP_ID

0x0812

Device identification

0x02

ID_VER

0x10

Revision number

0x10 for engineering sample

0x03

SYS_CTRL

R/W

0x0F

System control register

0x04

PORT_FUNCTION

R/W

0x00

Port function control register

0x06 - 07

SCRATCH_PAD

R/W

0x00

General purpose storage

RESERVED

SOFT_RESET

TSC_EN

RESERVED

PWM_OFF

GPIO_OFF

TSC_OFF

ADC_OFF

[7] RESERVED

[6] SOFT_RESET

Reset the 812 using serial communication

ALL REGISTER VALUES ARE RESETTED. State machines all back to POR states.

[5] TSC_EN

Write ‘1’ to enable operation of TSC. Write ‘0’ to disable it.

[4] RESERVED

[3] PWM_OFF

Writing ‘1’ switches OFF the clock supply to PWM

[2] GPIO_OFF

Writing ‘1’ switches OFF the clock supply to GPIO

[1] TSC_OFF

Writing ‘1’ switches OFF the clock supply to touchscreen controller

[0] ADC_OFF

Writing ‘1’ switches OFF the clock supply to ADC

Obsolete

Product(s)

- Obsolete

Product(s)

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