STMPE2403 datasheet(19/63 Pages) STMICROELECTRONICS

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STMPE2403

System controller

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7.2

System control register

Table 19. System control register

Bit

Soft_Reset Clock_Source Disable_32KHz Sleep

Enable_GPIO

Enable_PWM Enable_KPC Enable_ROT

Read/

Write (IIC)

WRW

Reset

Value

Table 20. System control register writing

Bits

Name

Description

Enable_ROT

Writing a ‘0’ to this bit will gate off the clock to the Rotator module, thus

stopping its operation

Enable_KPC

Writing a ‘0’ to this bit will gate off the clock to the Keypad Controller module,

thus stopping its operation

Enable_PWM

Writing a ‘0’ to this bit will gate off the clock to the PWM module, thus

stopping its operation

Enable_GPIO

Writing a ‘0’ to this bit will gate off the clock to the GPIO module, thus

stopping its operation

Sleep

Writing a ‘1’ to this bit will put the device in sleep mode. When in sleep

mode, all the units will work on 32KHz (typical) clock frequency.

Disable_32KHz

Set this bit to disable the 32KHz OSC, thus putting the device in hibernate

mode. Only a Reset or a wakeup on IIC will reset this bit

Clock_Source

Set to ‘1’ if external 32KHz clock were to be used. ‘0’ by default.

Soft_Reset

Writing a ‘1’ to this bit will do a soft reset of the device. Once the reset is

done, this bit will be cleared to ‘0’ by the HW.

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