STM32W108HB datasheet(48/179 Pages) STMICROELECTRONICS

48 / 179 page

General-purpose input/outputs

STM32W108CB, STM32W108HB

48/179

Doc ID 16252 Rev 2

Several GPIOs share an alternate output with Timer 2 and the Serial Controllers. Bits in

Timer 2's TIM2_OR register control routing Timer 2 outputs to different GPIOs. Bits in Timer

2's TIM2_CCER register enable Timer 2 outputs. When Timer 2 outputs are enabled they

override Serial Controller outputs. Table 5 indicates the GPIO mapping for Timer 2 outputs

depending on the bits in the register TIM2_OR. Refer to Section 8: General-purpose timers

on page 80 for complete information on timer configuration.

For outputs assigned to the serial controllers, the serial interface mode registers

(SCx_MODE) determine how the GPIO pins are used.

The alternate outputs of PA4 and PA5 can either provide packet trace data (PTI_EN and

PTI_DATA), or synchronous CPU trace data (TRACEDATA2 and TRACEDATA3).

If a GPIO does not have an associated peripheral in alternate output mode, its output is set

to 0.

6.1.3

Forced functions

For some GPIOs the GPIO_PxCFGH/L configuration may be overridden. Table 6 shows the

GPIOs that can have different functions forced on them regardless of the GPIO_PxCFGH/L

registers.

Note:

The DEBUG_DIS bit in the GPIO_DBGCFG register can disable the Serial Wire/JTAG

debugger interface. When this bit is set, all debugger-related pins (PC0, PC2, PC3, PC4)

behave as standard GPIO.

Table 5.

Timer 2 output configuration controls

Timer 2 Output

Option Register Bit

GPIO Mapping Selected by TIM2_OR Bit

TIM2_CH1

TIM2_OR[4]

PA0

PB1

TIM2_CH2

TIM2_OR[5]

PA3

PB2

TIM2_CH3

TIM2_OR[6]

PA1

PB3

TIM2_CH4

TIM2_OR[7]

PA2

PB4

Table 6.

GPIO forced functions

GPIO

Override condition

Forced function

Forced signal

PA7

GPIO_EXTREGEN bit set in the

GPIO_DBGCFG register

Open-drain output

REG_EN

PC0

Debugger interface is active in JTAG mode

Input with pull up

JRST

PC2

Debugger interface is active in JTAG mode

Push-pull output

JTDO

PC3

Debugger interface is active in JTAG mode

Input with pull up

JDTI

PC4

Debugger interface is active in JTAG mode

Input with pull up

JTMS

PC4

Debugger interface is active in Serial Wire

mode

Bidirectional (push-pull

output or floating

input) controlled by

debugger interface

SWDIO

STM32W108HB датащи(PDF) 48 Page - STMicroelectronics

STM32W108HB датащи(HTML) 48 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

датащи скачать

ссылки URL