STM32W108CZ STMicroelectronics, STM32W108CZ Datasheet - Page 82

• 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

Serial interfaces
9.4
9.4.1
82/232
SPI slave mode
Both SC1 and SC2 SPI controllers include a SPI slave controller with these features:
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The SPI slave controller uses four signals:
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The GPIO pins that can be assigned to these signals are shown in
Table 44.
Setup and configuration
Both serial controllers, SC1 and SC2, support SPI slave mode. SPI slave mode is enabled
by the following register settings:
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The SPI slave controller receives its clock from an external SPI master device and supports
rates up to 5 Mbps.
The SPI slave controller supports various frame formats depending upon the clock polarity
(SC_SPIPOL), clock phase (SC_SPIPHA), and direction of data (SC_SPIORD) (see Table 8
6). The SC_SPIPOL, SC_SPIPHA, and SC_SPIORD bits are defined within the
SCx_SPICFG registers.
Direction
GPIO
configuration
SC1 pin
SC2 pin
Parameter
Full duplex operation
Up to 5 Mbps data transfer rate
Programmable clock polarity and clock phase
Selectable data shift direction (either LSB or MSB first)
Slave select input
MOSI (Master Out, Slave In) - inputs serial data from the master
MISO (Master In, Slave Out) - outputs serial data to the master
SCLK (Serial Clock) - clocks data transfers on MOSI and MISO
nSSEL (Slave Select) - enables serial communication with the slave
The serial controller mode register, SCx_MODE, is ‘2’.
The SC_SPIMST bit in the SPI configuration register, SCx_SPICFG, is ‘0’.
SPI slave GPIO usage
STM32W108HB STM32W108CC STM32W108CB STM32W108CZ
MOSI
Input
Input
PB2
PA0
Doc ID 16252 Rev 13
Alternate Output
(push-pull)
Output
MISO
PB1
PA1
SCLK
Input
Input
PB3
PA2
Table
44.
nSSEL
Input
Input
PB4
PA3