STM32W108CZ STMicroelectronics, STM32W108CZ Datasheet - Page 117

• Manufacturer Part Number: STM32W108CZ
• Description: High-performance, IEEE 802.15.4 wireless system-on-chip with embedded Flash memory
• Manufacturer: STMicroelectronics

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

STM32W108HB STM32W108CC STM32W108CB STM32W108CZ
10.1
10.1.1
Functional description
The timers can optionally use GPIOs in the PA and PB ports for external inputs or outputs.
As with all STM32W108 digital inputs, a GPIO used as a timer input can be shared with
other uses of the same pin. Available timer inputs include an external timer clock, a clock
mask, and four input channels. Any GPIO used as a timer output must be configured as an
alternate output and is controlled only by the timer.
Many of the GPIOs that can be assigned as timer outputs can also be used by another on-
chip peripheral such as a serial controller. Use as a timer output takes precedence over
another peripheral function, as long as the channel is configured as an output in the
TIMx_CCMR1 register and is enabled in the TIMx_CCER register.
The GPIOs that can be used by Timer 1 are fixed, but the GPIOs that can be used as Timer
2 channels can be mapped to either of two pins, as shown in
Register (TIM2_OR) has four single bit fields (TIM_REMAPCy) that control whether a Timer
2 channel is mapped to its default GPIO in port PA, or remapped to a GPIO in PB.
Table 84
Table 84.
The TIMxCLK and TIMxMSK inputs can be used only in the external clock modes: refer to
the External Clock Source Mode 1 and External Clock Source Mode 2 sections for details
concerning their use.
Time-base unit
The main block of the general purpose timer is a 16-bit counter with its related auto-reload
register. The counter can count up, down, or alternate up and down. The counter clock can
be divided by a prescaler.
The counter, the auto-reload register, and the prescaler register can be written to or read by
software. This is true even when the counter is running.
The time-base unit includes:
●
●
●
Some timer registers cannot be directly accessed by software, which instead reads and
writes a "buffer register". The internal registers actually used for timer operations are called
"shadow registers".
Timer 1
Timer 2
(TIM_REMAPCy = 0)
Timer 2
(TIM_REMAPCy = 1)
Signal (direction)
Counter register (TIMx_CNT)
Prescaler register (TIMx_PSC)
Auto-reload register (TIMx_ARR)
specifies the pins that may be assigned to Timer 1 and Timer 2 functions.
Timer GPIO use
(in or out)
TIMxC1
PB6
PB1
PA0
Doc ID 16252 Rev 13
(in or out)
TIMxC2
PB7
PB2
PA3
(in or out)
TIMxC3
PB3
PA6
PA1
(in or out)
TIMxC4
PB4
PA7
PA2
Table
General-purpose timers
84. The Timer 2 Option
TIMxCLK
PB0
PB5
PB5
(in)
TIMxMSK
PB5
PB0
PB0
117/232
(in)