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UM0851 Datasheet(PDF) 7 Page - STMicroelectronics

Part # UM0851
Description  SPEAr is a family of highly customizable ARM-based embedded
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0851 Datasheet(HTML) 7 Page - STMicroelectronics

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UM0851
Contents
Doc ID 16604 Rev 2
7/245
8.1.2
Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
8.1.3
CLCD device driver interface with framebuffer layer . . . . . . . . . . . . . . 192
8.1.4
How to support a new CLCD panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
8.1.5
CLCD driver usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
8.1.6
Kernel configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
8.1.7
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8.2
TDM driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8.2.1
Hardware overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8.2.2
Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
8.2.3
TDM layer interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
8.2.4
Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
8.2.5
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
8.3
USB audio device class support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
9
Miscellaneous device drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
9.1
General purpose I/O (GPIO) driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
9.1.1
Hardware overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
9.1.2
Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
9.1.3
GPIO usage in user mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
9.1.4
GPIO usage in kernel mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
9.1.5
GPIO in interrupt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
9.1.6
Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
9.2
Watchdog (WDT) driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
9.2.1
Hardware overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
9.2.2
Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
9.2.3
Watchdog device driver interface with misc device layer . . . . . . . . . . . 213
9.2.4
Watchdog driver usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
9.2.5
Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
9.2.6
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
9.3
Pulse width modulator (PWM) driver . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
9.3.1
Hardware overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
9.3.2
Software overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
9.3.3
PWM usage in Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
9.3.4
Configuration options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
9.3.5
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
10
Power management section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220


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