atmega323l ATMEL Corporation, atmega323l Datasheet - Page 244

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

ii
ATmega323(L)
Clock Generation ............................................................................... 76
Two-wire Serial Interface (Byte Oriented) ..................................... 102
The Analog Comparator.................................................................. 124
Analog to Digital Converter ............................................................ 127
I/O Ports............................................................................................ 137
JTAG Interface and the On-chip Debug System ........................... 157
About Code Examples ........................................................................................ 75
AVR USART vs. AVR UART – Compatibility...................................................... 75
Frame Formats ................................................................................................... 78
Parity Bit Calculation........................................................................................... 79
USART Initialization............................................................................................ 79
Data Transmission – The USART Transmitter ................................................... 81
Data Reception – The USART Receiver ............................................................ 84
Asynchronous Data Reception ........................................................................... 88
Multi-processor Communication Mode ............................................................... 91
Accessing UBRRH/UCSRC Registers................................................................ 92
USART Register Description .............................................................................. 94
Examples of Baud Rate Setting.......................................................................... 99
Two-wire Serial Interface Modes ...................................................................... 107
Master Transmitter Mode.................................................................................. 108
Master Receiver Mode...................................................................................... 108
Slave Receiver Mode........................................................................................ 109
Slave Transmitter Mode.................................................................................... 110
Miscellaneous States........................................................................................ 110
Analog Comparator Multiplexed Input .............................................................. 126
Features............................................................................................................ 127
Operation .......................................................................................................... 128
Prescaling and Conversion Timing ................................................................... 129
ADC Noise Canceler Function.......................................................................... 131
Scanning Multiple Channels ............................................................................. 135
ADC Noise Canceling Techniques ................................................................... 135
ADC Characteristics – Preliminary Data........................................................... 136
Port A................................................................................................................ 137
Port B................................................................................................................ 139
Port C................................................................................................................ 146
Port D................................................................................................................ 151
Features............................................................................................................ 157
Overview........................................................................................................... 157
The Test Access Port – TAP ............................................................................ 158
Using the Boundary-Scan Chain ...................................................................... 161
1457G–AVR–09/03