STM32W108C8U64TR STMicroelectronics, STM32W108C8U64TR Datasheet - Page 55
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
8.1
8.1.1
Note:
8.1.2
Functional description
GPIO ports
The 24 GPIO pins are grouped into three ports: PA, PB, and PC. Individual GPIOs within a
port are numbered 0 to 7 according to their bit positions within the GPIO registers.
Because GPIO port registers' functions are identical, the notation Px is used here to refer to
PA, PB, or PC. For example, GPIO_PxIN refers to the registers GPIO_PAIN, GPIO_PBIN,
and GPIO_PCIN.
Each of the three GPIO ports has the following registers whose low-order eight bits
correspond to the port's eight GPIO pins:
●
●
●
●
●
In addition to these registers, each port has a pair of configuration registers,
GPIO_PxCFGH and GPIO_PxCFGL. These registers specify the basic operating mode for
the port's pins. GPIO_PxCFGL configures the pins Px[3:0] and GPIO_PxCFGH configures
the pins Px[7:4]. For brevity, the notation GPIO_PxCFGH/L refers to the pair of configuration
registers.
Five GPIO pins (PA6, PA7, PB6, PB7 and PC0) can sink and source higher current than
standard GPIO outputs. Refer to
information.
Configuration
Each pin has a 4-bit configuration value in the GPIO_PxCFGH/L register. The various GPIO
modes and their 4 bit configuration values are shown in
Table 6.
Analog
Input (floating)
Input (pull-up or pull-
down)
Output (push-pull)
Output (open-drain)
Alternate Output (push-
pull)
GPIO_PxIN (input data register) returns the pin level (unless in analog mode).
GPIO_PxOUT (output data register) controls the output level in normal output mode.
GPIO_PxCLR (clear output data register) clears bits in GPIO_PxOUT.
GPIO_PxSET (set output data register) sets bits in GPIO_PxOUT.
GPIO_PxWAKE (wake monitor register) specifies the pins that can wake the
STM32W108C8.
GPIO mode
GPIO configuration modes
GPIO_PxCFGH/L
Doc ID 018587 Rev 1
0x0
0x4
0x8
0x1
0x5
0x9
Table 53: Digital I/O characteristics on page 197
Analog input or output. When in analog mode, the
digital input (GPIO_PxIN) always reads 1.
Digital input without an internal pull up or pull down.
Output is disabled.
Digital input with an internal pull up or pull down. A set
bit in GPIO_PxOUT selects pull up and a cleared bit
selects pull down. Output is disabled.
Push-pull output. GPIO_PxOUT controls the output.
Open-drain output. GPIO_PxOUT controls the output.
If a pull up is required, it must be external.
Push-pull output. An onboard peripheral controls the
output.
Table
General-purpose input/outputs
Description
6.
for more
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