STM32W108HB datasheet(63/179 Pages) STMICROELECTRONICS

63 / 179 page

STM32W108CB, STM32W108HB

Serial interfaces

Doc ID 16252 Rev 2

63/179

7.1

Configuration

Before using a serial controller, it should be configured and initialized as follows:

Set up the parameters specific to the operating mode (master/slave for SPI, baud rate

for UART, etc.).

Configure the GPIO pins used by the serial controller as shown in Table 9 and Table 10.

Section 6.1.2: Configuration on page 47 shows how to configure GPIO pins."If using

DMA, set up the DMA and buffers. This is described fully in Section 7.7: DMA channel

registers on page 72.

If using interrupts, select edge- or level-triggered interrupts with the SCx_INTMODE

Write the serial interface operating mode - SPI, TWI, or UART - to the SCx_MODE

Table 9.

SC1 GPIO usage and configuration

Interface

PB1

PB2

PB3

PB4

SPI - Master

SC1MOSI alternate

output (push-pull)

SC1MISO input

SC1SCLK alternate

output (push-pull);

special SCLK mode

(not used)

SPI - Slave

SC1MISO alternate

output (push-pull)

SC1MOSI input

SC1SCLK input

SC1nSSEL input

TWI - Master

SC1SDA alternate

output (open-drain)

SC1SCL alternate

output (open-drain)

(not used)

UART

TXD alternate

output (push-pull)

RXD input

nCTS input (1)

used if RTS/CTS hardware flow control is enabled.

nRTS alternate

output (push-pull)

(1)

Table 10.

SC2 GPIO usage and configuration

Interface

PA0

PA1

PA2

PA3

SPI - Master

SC2MOSI

Alternate Output

(push-pull)

SC2MISO Input

SC2SCLK

Alternate Output

(push-pull), special

SCLK mode

(not used)

SPI - Slave

SC2MOSI

Alternate Output

(push-pull)

SC2MISO Input

SC2SCLK Input

SC2nSSEL Input

TWI - Master

(not used)

SC2SDA Alternate

Output (open-drain)

SC2SCL Alternate

Output (open-drain)

(not used)

STM32W108HB Datasheet(PDF) 63 Page - STMicroelectronics

STM32W108HB Datasheet(HTML) 63 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL