ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 922

• 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

35.10.4
35.10.4.1
32142A–12/2011
SPI Timing
Master mode
Maximum SPI Frequency, Slave Input Mode
The maximum SPI slave input frequency is given by the following formula:
Where
on CPOL and NCPHA.
chapter for a description of this clock.
Maximum SPI Frequency, Slave Output Mode
The maximum SPI slave output frequency is given by the following formula:
Where
the SPI master setup time. Please refer to the SPI master datasheet for
maximum frequency of the CLK_SPI. Refer to the SPI chapter for a description of this
clock.
tics section for the maximum frequency of the pins.
Figure 35-14. SPI Master Mode with (CPOL= NCPHA= 0) or (CPOL= NCPHA= 1)
SPCK
MISO
MOSI
f
PINMAX
SPIn
SPIn
is the MOSI setup and hold time, USPI7 + USPI8 or USPI10 + USPI11 depending
is the maximum frequency of the SPI pins. Please refer to the I/O Pin Characteris-
is the MISO delay, USPI6 or USPI9 depending on CPOL and NCPHA.
f
SPI2
SPCKMAX
f
CLKSPI
f
SPCKMAX
=
is the maximum frequency of the CLK_SPI. Refer to the SPI
MIN
SPI0
(
f
---------------------------- - f
CLKSPI
=
MIN
9
(
f
---------------------------- -
2
CLKSPI
SPI1
PINMAX
ATUC64/128/256L3/4U
9
2
,
,
----------- -
SPIn
------------------------------------
SPIn
1
)
+
1
t
SETUP
T
)
SETUP
.
f
CLKSPI
T
SETUP
is the
922
is