STM32W108C8U64TR STMicroelectronics, STM32W108C8U64TR Datasheet - Page 33
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STM32W108C8U64TR
Manufacturer Part Number
STM32W108C8U64TR
Description
16/32-BITS MICROS
Manufacturer
STMicroelectronics
Series
STM32r
Datasheet
1.STM32W108C8U63TR.pdf
(207 pages)
Specifications of STM32W108C8U64TR
Applications
RF4CE, Remote Control
Core Processor
ARM® Cortex-M3™
Program Memory Type
FLASH (64 kB)
Controller Series
STM32W
Ram Size
8K x 8
Interface
I²C, SPI, UART/USART
Number Of I /o
24
Voltage - Supply
1.18 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-VFQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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STM32W108C8
6.1
6.1.1
6.1.2
Power domains
The STM32W108C8 contains three power domains:
●
●
●
Internally regulated power
The preferred and recommended power configuration is to use the internal regulated power
supplies to provide power to the core and memory domains. The internal regulators
(VREG_1V25 and VREG_1V8) generate nominal 1.25 V and 1.8 V supplies. The 1.25 V
supply is internally routed to the core domain and to an external pin. The 1.8 V supply is
routed to an external pin where it can be externally routed back into the chip to supply the
memory domain. The internal regulators are described in
regulator on page
When using the internal regulators, the always-on domain must be powered between 2.1 V
and 3.6 V at all four VDD_PADS pins.
When using the internal regulators, the VREG_1V8 regulator output pin (VREG_OUT) must
be connected to the VDD_MEM, VDD_PADSA, VDD_VCO, VDD_RF, VDD_IF, VDD_PRE,
and VDD_SYNTH pins.
When using the internal regulators, the VREG_1V25 regulator output and supply requires a
connection between both VDD_CORE pins.
Externally regulated power
Optionally, the on-chip regulators may be left unused, and the core and memory domains
may instead be powered from external supplies. For simplicity, the voltage for the core
domain can be raised to nominal 1.8 V, requiring only one external regulator. Note that if the
core domain is powered at a higher voltage (1.8 V instead of 1.25 V) then power
consumption increases. A regulator enable signal, REG_EN, is provided for control of
external regulators. This is an open-drain signal that requires an external pull-up resistor. If
REG_EN is not required to control external regulators it can be disabled (see
Forced functions on page
Using an external regulator requires the always-on domain to be powered between 1.8 V
and 3.6 V at all four VDD_PADS pins.
When using an external regulator, the VREG_1V8 regulator output pin (VREG_OUT) must
be left unconnected.
When using an external regulator, this external nominal 1.8 V supply has to be connected to
both VDD_CORE pins and to the VDD_MEM, VDD_PADSA, VDD_VCO, VDD_RF, VDD_IF,
VDD_PRE and VDD_SYNTH pins.
An "always on domain" containing all logic and analog cells required to manage the
STM32W108C8's power modes, including the GPIO controller and sleep timer. This
domain must remain powered.
A "core domain" containing the CPU, Nested Vectored Interrupt Controller (NVIC), and
peripherals. To save power, this domain can be powered down using a mode called
deep sleep.
A "memory domain" containing the RAM and flash memories. This domain is managed
by the power management controller. When in deep sleep, the RAM portion of this
domain is powered from the always-on domain supply to retain the RAM contents while
the regulators are disabled. During deep sleep the flash portion is completely powered
down.
52.
56).
Doc ID 018587 Rev 1
Section 7: Integrated voltage
System modules
Section 8.1.3:
33/207
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