AT32UC3L064_1 ATMEL [ATMEL Corporation], AT32UC3L064_1 Datasheet - Page 516

• Manufacturer Part Number: AT32UC3L064_1
• Description: AVR32 32-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

23. Two-Wire Slave Interface (TWIS)
23.1
23.2
32099A–AVR32–06/09
Features
Overview
Rev 1.1.2.1
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The Atmel Two-wire Interface Slave (TWIS) interconnects components on a unique two-wire
bus, made up of one clock line and one data line with speeds of up to 400 kbit/s, based on a
byte-oriented transfer format. It can be used with any Atmel Two-wire Interface bus I²C or
SMBus compatible master. TWIS is always a bus slave and can transfer sequential or single
bytes.
Below,
and a full I²C compatible device.
Table 23-1.
Note:
I²C
Standard Mode Speed (100 KHz)
Fast Mode Speed (400 KHz)
7 or 10 bits Slave Addressing
START BYTE
Repeated Start (Sr) Condition
ACK and NAK Management
Slope control and input filtering (Fast mode)
Clock stretching
Compatible with I
Compatible with SMBus standard
Compatible with PMBus
DMA interface for reducing CPU load
Arbitrary transfer lengths, including 0 data bytes
Optional clock stretching if transmit or receive buffers not ready for data transfer
32-bit Peripheral Bus interface for configuration of the interface
– 100 and 400 kbit/s transfer speeds
– 7 and 10-bit and General Call addressing
– Hardware Packet Error Checking (CRC) generation and verification with ACK response
– SMBALERT interface
– 25 ms clock low timeout delay
– 25 ms slave cumulative clock low extend time
Standard
Table 23-1 on page 516
1. START + b000000001 + Ack + Sr
(1)
Atmel TWIS Compatibility with I²C Standard
²
C standard
lists the compatibility level of the Atmel Two-wire Slave Interface
Atmel TWIS
Supported
Supported
Supported
Not Supported
Supported
Supported
Supported
Supported
AT32UC3L
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