AT32UC3L032-D3UR Atmel, AT32UC3L032-D3UR Datasheet - Page 505

• Manufacturer Part Number: AT32UC3L032-D3UR
• Description: MCU AVR32 32KB FLASH 48TLLGA
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3L032-D3UR

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TLLGA
• Processor Series: AT32UC3x
• Core: AVR32
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: SPI, TWI, USART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 7
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR32, EWAVR32-BL
• Development Tools By Supplier: AT32UC3L-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 9 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

22.8.2
22.8.2.1
32099F–11/2010
Operation
Bus Timing
TWIS has two modes of operation:
A master is a device which starts and stops a transfer and generates the TWCK clock. A slave
is assigned an address and responds to requests from the master. These modes are
described in the following chapters.
Figure 22-5. Typical Application Block Diagram
The Timing Register (TR) is used to control the timing of bus signals driven by TWIS. TR
describes bus timings as a function of cycles of the prescaled CLK_TWIS. The clock prescal-
ing can be selected through TR.EXP.
TR has the following fields:
TLOWS: Prescaled clock cycles used to time SMBUS timeout T
TTOUT: Prescaled clock cycles used to time SMBUS timeout T
SUDAT: Non-prescaled clock cycles for data setup and hold count. Used to time T
EXP: Specifies the clock prescaler setting used for the SMBUS timeouts.
f
• Slave transmitter mode
• Slave receiver mode
prescaled
Rp: Pull up value as given by the I²C Standard
Host with
Interface
TWI
=
f
-------------------------- -
2
CLK TWIS
TWD
TWCK
(
EXP
–
Serial EEPROM
+ )
1
Atmel TWI
)
Slave 1
I²C RTC
Slave 2
Controller
I²C LCD
Slave 3
AT32UC3L016/32/64
TIMEOUT
LOW:SEXT
I²C Temp.
Slave 4
Sensor
.
.
Rp
Rp
SU_DAT
VDD
.
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