STM32W108CBU6 STMICROELECTRONICS [STMicroelectronics], STM32W108CBU6 Datasheet - Page 10

• Manufacturer Part Number: STM32W108CBU6
• Description: High-performance, IEEE 802.15.4 wireless system-on-chip
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Description
1.1
1.2
1.2.1
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Development tools
The STM32W108 utilizes standard Serial Wire and JTAG interfaces for powerful software
debugging and programming of the ARM® Cortex™-M3 core. The STM32W108 integrates
the standard ARM system debug components: Flash Patch and Breakpoint (FPB), Data
Watchpoint and Trace (DWT), and Instrumentation Trace Macrocell (DWT).
Figure 1.
Overview
ARM® CortexTM-M3 core with embedded Flash and SRAM
The ARM Cortex™-M3 processor is the latest generation of ARM processors for embedded
systems. It has been developed to provide a low-cost platform that meets the needs of MCU
implementation, with a reduced pin count and low-power consumption, while delivering
outstanding computational performance and an advanced system response to interrupts.
The ARM Cortex™-M3 32-bit RISC processor features exceptional code-efficiency,
delivering the high-performance expected from an ARM core in the memory size usually
associated with 8- and 16-bit devices.
The ARM® Cortex-M3 uses an advanced 32-bit modified Harvard architecture processor
that has separate internal program and data buses, but presents a unified program and data
address space to software. The word width is 32 bits for both the program and data sides.
The ARM® Cortex-M3 allows unaligned word and half-word data accesses to support
efficiently-packed data structures.
The ARM® Cortex-M3 clock speed is configurable to 6 MHz, 12 MHz, or 24 MHz. For
normal operation 12 MHz is preferred over 24 MHz due to its lower power consumption. The
RF_TX_ALT_P,N
VREG_OUT
nRESET
RF_P,N
BIAS_R
OSCA
OSCB
STM32W108 block diagram
PA select
HF crystal
Regulator
LF crystal
PA
OSC
POR
OSC
Bias
LNA
PA
Internal HF
Internal LF
RC-OSC
RC-OSC
Doc ID 16252 Rev 2
SYNTH
IF
Calibration
Purpose
General
ADC
DAC
ADC
ADC
PA[7:0], PB[7:0], PC[7:0]
GPIO multiplexor swtich
Packet Trace
Baseband
Packet sniffer
purpose
registers
SPI/TWI
General
MAC
UART/
timers
TX_ACTIVE
GPIO
+
STM32W108CB, STM32W108HB
Always
Powered
Domain
ARM CORTEX-M3
CPU debug
TPIU/ITM/
CPU with NVIC
FPB/DWT
Watchdog
8 kBytes
manage r
SRAM
Data
and MPU
Chip
®
Wire and
debug
128 kBytes
Serial
JTAG
Sleep
timer
Program
Encryption
controller
Flash
Interrupt
acclerator
2
nd
level
SWCLK,
Ai15250
JTCK