STM32W108HB datasheet(73/278 Pages) STMICROELECTRONICS

Part #	STM32W108HB

Description	High-performance, IEEE 802.15.4 wireless system-on-chip with up to 256 Kbytes of embedded Flash memory

PDF	278 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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73 / 278 page

STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

System modules

Doc ID 16252 Rev 14

73/278

Clearing both CSYSPWRUPREQ and CDBGPWRUPREQ allows the STM32W108 to

achieve a true deep sleep state (deep sleep 1 or 2). Both of these signals also operate as

wake sources, so that when a debugger connects to the STM32W108 and begins accessing

the chip, the STM32W108 automatically comes out of deep sleep. When the debugger

initiates access while the STM32W108 is in deep sleep, the SWJ intelligently holds off the

debugger for a brief period of time until the STM32W108 is properly powered and ready.

For more information regarding the SWJ and the interaction of debuggers with deep sleep,

contact ST support for Application Notes and ARM® CoreSight documentation.

6.5.5

Power management registers

Power deep sleep control register 1 (PWR_DSLEEPCR1)

Address:

0x4000 0004

Reset value:

0x0000 0000

Reserved, must be kept at reset value

LVFREEZE: LV freeze state

Reserved, must be kept at reset value

Reserved

LVFREEZE

Reserved

Bits [31:2]

Bit 1

1: Enables LV freeze output states

0: Disables GPIO freeze

Bit 0

STM32W108HB Datasheet(PDF) 73 Page - STMicroelectronics