AT91SAM7S32-AI ATMEL [ATMEL Corporation], AT91SAM7S32-AI Datasheet - Page 439

• Manufacturer Part Number: AT91SAM7S32-AI
• Description: AT91 ARM Thumb-based Microcontrollers
• Manufacturer: ATMEL [ATMEL Corporation]

6071A–ATARM–28-Oct-04
Universal Synchronous/Asynchronous Receiver/Transmitter (USART) 265
Two-wire Interface (TWI) User Interface ...................................................... 256
Overview.......................................................................................................... 265
Block Diagram................................................................................................. 266
Application Block Diagram ............................................................................ 267
I/O Lines Description ..................................................................................... 267
Product Dependencies................................................................................... 268
Functional Description................................................................................... 269
USART User Interface ................................................................................... 292
Read/Write Flowcharts................................................................................. 254
TWI Control Register.................................................................................... 257
TWI Master Mode Register .......................................................................... 258
TWI Internal Address Register ..................................................................... 259
TWI Clock Waveform Generator Register.................................................... 259
TWI Status Register ..................................................................................... 260
TWI Interrupt Enable Register...................................................................... 261
TWI Interrupt Disable Register..................................................................... 262
TWI Interrupt Mask Register ........................................................................ 263
TWI Receive Holding Register ..................................................................... 264
TWI Transmit Holding Register .................................................................... 264
I/O Lines....................................................................................................... 268
Power Management ..................................................................................... 268
Interrupt........................................................................................................ 268
Baud Rate Generator ................................................................................... 269
Receiver and Transmitter Control ................................................................ 273
Synchronous and Asynchronous Modes...................................................... 273
ISO7816 Mode ............................................................................................. 283
IrDA Mode .................................................................................................... 285
RS485 Mode ................................................................................................ 288
Modem Mode ............................................................................................... 289
Test Modes .................................................................................................. 290
USART Control Register .............................................................................. 293
USART Mode Register................................................................................. 295
USART Interrupt Enable Register ................................................................ 298
USART Interrupt Disable Register ............................................................... 299
USART Interrupt Mask Register................................................................... 300
USART Channel Status Register ................................................................. 301
USART Receive Holding Register ............................................................... 303
USART Transmit Holding Register .............................................................. 303
USART Baud Rate Generator Register ....................................................... 304
USART Receiver Time-out Register ............................................................ 305
USART Transmitter Timeguard Register ..................................................... 306
USART FI DI RATIO Register ...................................................................... 307
USART Number of Errors Register .............................................................. 308
USART IrDA FILTER Register ..................................................................... 308
AT91SAM7S32 Preliminary
ix