AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 469

• Manufacturer Part Number: AT32UC3L-EK
• Description: KIT EVAL AVR32 UC3 MCU
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT32UC3L-EK

• Contents: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: UC3L
• Kit Contents: Board
• Features: USB / Battery Powered, Board Controller / Bootloader
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Tool Type: Starter Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor Series: AT32
• Processor To Be Evaluated: AT32UC3L064
• Interface Type: USB, Capacitive Touch
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

21.5
21.6
Table 21-4.
21.7
21.7.1
21.7.2
32099F–11/2010
Pin Name
TWD
TWCK
TWALM
Application Block Diagram
I/O Lines Description
Product Dependencies
I/O Lines
Power Management
I/O Lines Description
Figure 21-2. Application Block Diagram
In order to use this module, other parts of the system must be configured correctly, as
described below.
Both TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a cur-
rent source or pull-up resistor (see
are high. The output stages of devices connected to the bus must have an open-drain or open-
collector to perform the wired-AND function.
TWALM is used to implement the optional SMBus SMBALERT signal.
The TWALM, TWD, and TWCK pins may be multiplexed with I/O Controller lines. To enable
the TWIM, the programmer must perform the following steps:
If the CPU enters a sleep mode that disables clocks used by the TWIM, the TWIM will stop
functioning and resume operation after the system wakes up from sleep mode.
• Program the I/O Controller to:
Rp: Pull up value as given by the I²C Standard
Master
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
SMBus SMBALERT
TWI
– Dedicate TWD, TWCK and optionally TWALM as peripheral lines.
– Define TWD, TWCK and optionally TWALM as open-drain.
TWD
TWCK
serial EEPROM
Atmel TWI
Slave 1
Figure 21-2 on page
I²C RTC
Slave 2
controller
I²C LCD
Slave 3
AT32UC3L016/32/64
469). When the bus is free, both lines
I²C temp.
Slave 4
sensor
Rp
Input/Output
Input/Output
Input/Output
Type
Rp
VDD
469