ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 241
ATA6602-PLQW
Manufacturer Part Number
ATA6602-PLQW
Description
Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA6602-PLQW.pdf
(362 pages)
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4921C–AUTO–01/07
Even though this example is simple, it shows the principles involved in all TWI transmissions.
These can be summarized as follows:
In the following an assembly and C implementation of the example is given. Note that the code
below assumes that several definitions have been made, for example by using include-files.
• When the TWI has finished an operation and expects application response, the TWINT Flag
• When the TWINT Flag is set, the user must update all TWI Registers with the value relevant
• After all TWI Register updates and other pending application software tasks have been
is set. The SCL line is pulled low until TWINT is cleared.
for the next TWI bus cycle. As an example, TWDR must be loaded with the value to be
transmitted in the next bus cycle.
completed, TWCR is written. When writing TWCR, the TWINT bit should be set. Writing a
one to TWINT clears the flag. The TWI will then commence executing whatever operation
was specified by the TWCR setting.
ATA6602/ATA6603
241
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