STM32W108CZ STMicroelectronics, STM32W108CZ Datasheet - Page 59
STM32W108CZ
Manufacturer Part Number
STM32W108CZ
Description
High-performance, IEEE 802.15.4 wireless system-on-chip with embedded Flash memory
Manufacturer
STMicroelectronics
Datasheet
1.STM32W108CC.pdf
(232 pages)
Specifications of STM32W108CZ
Receive Current (w/ Cpu)
27 mA
Transmit Current (w/ Cpu, +3 Dbm Tx)
31 mA
Low Deep Sleep Current, With Retained Ram And Gpio
400 nA/800 nA with/without sleep timer
Standard Arm Debug Capabilities
Flash patch & breakpoint; data watchpoint & trace; instrumentation trace macrocell
Single Voltage Operation
2.1-3.6 V with internal 1.8 V and 1.25 V regulators
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STM32W108HB STM32W108CC STM32W108CB STM32W108CZ
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 22.
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
STM32W108.
GPIO mode
GPIO configuration modes
GPIO_PxCFGH/L
Doc ID 16252 Rev 13
Table 151: Digital I/O characteristics on page 218
0x0
0x4
0x8
0x1
0x5
0x9
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
22.
Description
for more
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