STM32W108HBU6 STMicroelectronics, STM32W108HBU6 Datasheet - Page 74

• Manufacturer Part Number: STM32W108HBU6
• Manufacturer: STMicroelectronics

Specifications of STM32W108HBU6

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Processing Unit: Microprocessor
• Operating Supply Voltage (min): 1.18V
• Operating Supply Voltage (typ): 1.25V
• Operating Supply Voltage (max): 1.32V
• Package Type: VFQFPN EP
• Pin Count: 40
• Mounting: Surface Mount
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Serial interfaces
9.3.1
Table 14.
74/208
MST
1
1
SCx_SPICFG
SC_SPIxxx
ORD
0
0
Table 13.
Setup and configuration
Both serial controllers, SC1 and SC2, support SPI master mode. SPI master mode is
enabled by the following register settings:
●
●
●
The SPI serial clock (SCLK) is produced by a programmable clock generator. The serial
clock is produced by dividing down 12 MHz according to this equation:
EXP is the value written to the SCx_RATEEXP register and LIN is the value written to the
SCx_RATELIN register. The SPI master mode clock may not exceed 6 Mbps, so EXP and
LIN cannot both be zero.
The SPI master controller supports various frame formats depending upon the clock polarity
(SC_SPIPOL), clock phase (SC_SPIPHA), and direction of data (SC_SPIORD) (see
master mode formats on page
are defined within the SCx_SPICFG register.
SPI master mode formats
Direction
GPIO
Configuration
SC1 pin
SC2 pin
PHA
0
0
(1)
The serial controller mode register (SCx_MODE) is ‘2’.
The SC_SPIMST bit in the SPI configuration register (SCx_SPICFG) is ‘1’.
The SC_TWIACK bit in the I
POL
0
1
SPI master GPIO usage
SCLK
MOSI
MISO
SCLK
MOSI
Alternate Output
MISO
out
out
(push-pull)
in
out
out
in
Output
MOSI
PB1
PA0
RX[7]
TX[7]
Doc ID 16252 Rev 7
RX[7]
TX[7]
74). The bits SC_SPIPOL, SC_SPIPHA, and SC_SPIORD
Rate
2
C control register (SCx_TWICTRL2) is ‘1’.
TX[6]
RX[6]
TX[6]
RX[6]
=
---------------------------------------- -
(
LIN
RX[5]
TX[5]
RX[5]
TX[5]
Frame formats
12MHz
+
RX[4]
TX[4]
RX[4]
MISO
TX[4]
Input
Input
PB2
1
PA1
)x2
TX[3]
RX[3]
TX[3]
RX[3]
EXP
STM32W108CB, STM32W108HB
RX[2]
TX[2]
RX[2]
TX[2]
Alternate Output (push-pull)
RX[1]
TX[1]
RX[1]
TX[1]
Special SCLK mode
TX[0]
RX[0]
Output
RX[0]
SCLK
TX[0]
PB3
PA2
SPI