{"id":2335,"date":"2019-07-03T09:56:20","date_gmt":"2019-07-03T09:56:20","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=2335"},"modified":"2022-11-18T10:18:54","modified_gmt":"2022-11-18T04:48:54","slug":"alternate-functionality-configuration-gpio-pin","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/alternate-functionality-configuration-gpio-pin\/","title":{"rendered":"STM32 GPIO Lecture 14 : Alternate functionality configuration of a GPIO pin"},"content":{"rendered":"
\n
\n
\n
\n

 <\/p>\n<\/div>\n

\n

Alternate functionality configuration of a GPIO pin<\/strong><\/span><\/h2>\n
\n
\n

 <\/p>\n

<\/div>\n

 <\/p>\n<\/div>\n<\/div>\n

 <\/p>\n

In alternate functionality mode, as the name indicates the pin will assign for other functionality.<\/span><\/p>\n

 <\/p>\n

\"Alternate
Figure. Alternate function configuration<\/span><\/figcaption><\/figure>\n

 <\/p>\n

Let\u2019s discuss what precisely alternate function mode. <\/span><\/p>\n

In the alternate function mode, as the name indicates, the pin will be assigned for alternate functionality. <\/span>The alternate functionality can be anything like UART-TX, UART-RX, timers input channel or ADC\u2019s input channel, etc\u2026<\/span><\/p>\n

From Figure1, the output control now actually driven by the alternate function output, not from the output which comes from the output data register. Here, the output data register has no control over the output control block.<\/span><\/p>\n

When the I\/O port is programmed as an alternate function as shown in Figure:<\/span><\/p>\n

 <\/p>\n