ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 563

• Manufacturer Part Number: ATUC128L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC128L4U

• Flash (kbytes): 128 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

23.5
23.6
Table 23-4.
23.7
23.7.1
32142A–12/2011
Pin Name
TWD
TWCK
TWALM
Application Block Diagram
I/O Lines Description
Product Dependencies
I/O Lines
I/O Lines Description
Figure 23-2. Application Block Diagram
In order to use this module, other parts of the system must be configured correctly, as described
below.
TWDand TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see
high. The output stages of devices connected to the bus must have an open-drain or open-col-
lector to perform the wired-AND function.
TWALM is used to implement the optional SMBus SMBALERT signal.
TWALM, TWD, and TWCK pins may be multiplexed with I/O Controller lines. To enable the
TWIS, the user must perform the following steps:
• Program the I/O Controller to:
Rp: Pull up value as given by the I²C Standard
Host with
Interface
– Dedicate TWD, TWCK, and optionally TWALM as peripheral lines.
– Define TWD, TWCK, and optionally TWALM as open-drain.
TWI
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
SMBus SMBALERT
TWD
TWCK
serial EEPROM
Atmel TWI
Slave 1
Figure 23-5 on page
I²C RTC
Slave 2
controller
I²C LCD
Slave 3
565). When the bus is free, both lines are
ATUC64/128/256L3/4U
I²C temp.
Slave 4
sensor
Rp
Input/Output
Input/Output
Input/Output
Type
Rp
VDD
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