ATUC64L4U Atmel Corporation, ATUC64L4U Datasheet - Page 903

• Manufacturer Part Number: ATUC64L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC64L4U

• Flash (kbytes): 64 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

Table 35-9.
Note:
35.6
35.6.1
35.6.1.1
Table 35-10. Digital Clock Characteristics
Note:
35.6.1.2
Table 35-11. Crystal Oscillator Characteristics
32142A–12/2011
Symbol
t
f
Symbol
f
t
t
C
Symbol
f
C
C
FALL
MAX
CPXIN
CPXIN
STARTUP
OUT
IN
L
i
1. V
Oscillator Characteristics
1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
Oscillator 0 (OSC0) Characteristics
cess technology. These values are not covered by test limits in production.
VDD
Parameter
Fall time
Max frequency
Digital Clock Characteristics
Crystal Oscillator Characteristics
TWI Pin Characteristics
Parameter
Crystal oscillator frequency
Crystal load capacitance
Internal equivalent load capacitance
corresponds to either V
Parameter
XIN clock frequency
XIN clock duty cycle
Startup time
XIN input capacitance
The following table describes the characteristics for the oscillator when a digital clock is applied
on XIN.
The following table describes the characteristics for the oscillator when a crystal is connected
between XIN and XOUT as shown in
where the crystal load capacitance
can be found in the crystal datasheet. The capacitance of the external capacitors (C
then be computed as follows:
where C
PCB
(1)
VDDIN
(3)
(1)
is the capacitance of the PCB and
(3)
or V
VDDIO
, depending on the supply for the pin. Refer to
Cbus = 400pF, V
Cbus = 400pF, V
Cbus = 400pF, V
Condition
Conditions
Conditions
TQFP48 package
QFN48 package
TLLGA48 package
C
C
L
LEXT
is within the range given in the table. The exact value of C
Figure
VDD
VDD
VDD
=
> 2.0V
> 1.62V
> 2.0V
2 C
35-3. The user must choose a crystal oscillator
C
L
i
–
is the internal equivalent load capacitance.
Min
C
i
ATUC64/128/256L3/4U
40
–
C
Min
400
PCB
0.45
Min
6
Typ
7.0
6.7
6.7
0
Section on page 10
Typ
250
470
Typ
10
2
Max
50
60
Max
Max
16
18
Units
for details.
cycles
MHz
LEXT
pF
%
MHz
Unit
Units
pF
kHz
ns
) can
903
L