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AN671 Datasheet(PDF) 5 Page - Silicon Laboratories

Part # AN671
Description  PRECISION32??PORT I/O CROSSBAR DECODER
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

AN671 Datasheet(HTML) 5 Page - Silicon Laboratories

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AN671
Rev. 0.1
5
4. Configuring the Crossbar and Port I/O in Firmware
The Precision32 AppBuilder application provides a graphical interface to easily configure pins in the crossbars.
This software uses the Hardware Access Layer (HAL), a part of the Silicon Labs SDK package that enables rapid
development on SiM3xxxx devices. The crossbars and Port Banks on SiM3xxxx devices are part of the PBCFG
and PBSTD modules.
The following steps show an example of how to initialize the crossbars and pins on SiM3U1xx devices to achieve
the pinout shown in Figure 3 using the Silicon Labs HAL:
1. Enable the APB clock to the I/O modules:
2. Configure pins to be skipped by the crossbars and enable signals in the crossbars. A full list of signal
names that may be enabled in the crossbars can be found in a file named SI32_PBCFG_A_Support.h.
3. Configure the functional and output mode of each pin:
4. Enable the crossbar or crossbars:


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