AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 184
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AT90PWM216
Manufacturer Part Number
AT90PWM216
Description
Manufacturer
Atmel Corporation
Specifications of AT90PWM216
Flash (kbytes)
16 Kbytes
Pin Count
24
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
19
Ext Interrupts
4
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 105
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
1
Pwm Channels
7
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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17.2.6
17.3
7710F–AVR–09/11
Data Modes
SPI Data Register – SPDR
• Bits 7:0 - SPD7:0: SPI Data
The SPI Data Register is a read/write register used for data transfer between the Register File
and the SPI Shift Register. Writing to the register initiates data transmission. Reading the regis-
ter causes the Shift Register Receive buffer to be read.
There are four combinations of SCK phase and polarity with respect to serial data, which are
determined by control bits CPHA and CPOL. The SPI data transfer formats are shown in
17-3
nal, ensuring sufficient time for data signals to stabilize. This is clearly seen by summarizing
Table 17-2
Table 17-5.
Figure 17-3. SPI Transfer Format with CPHA = 0
Bit
Read/Write
Initial Value
and
CPOL=0, CPHA=0
CPOL=0, CPHA=1
CPOL=1, CPHA=0
CPOL=1, CPHA=1
Figure
and
SCK (CPOL = 0)
mode 0
SCK (CPOL = 1)
mode 2
SAMPLE I
MOSI/MISO
CHANGE 0
MOSI PIN
CHANGE 0
MISO PIN
CPOL Functionality
SS
SPD7
Table
MSB first (DORD = 0)
LSB first (DORD = 1)
R/W
17-4. Data bits are shifted out and latched in on opposite edges of the SCK sig-
7
X
17-3, as done below:
SPD6
R/W
X
6
MSB
LSB
Sample (Falling)
SPD5
Sample (Rising)
R/W
Leading Edge
Setup (Falling)
Setup (Rising)
5
X
Bit 6
Bit 1
SPD4
R/W
X
4
Bit 5
Bit 2
SPD3
R/W
3
X
Bit 4
Bit 3
Sample (Falling)
Sample (Rising)
Setup (Falling)
Setup (Rising)
Trailing eDge
SPD2
Bit 3
Bit 4
R/W
AT90PWM216/316
X
2
Bit 2
Bit 5
SPD1
R/W
1
X
Bit 1
Bit 6
SPD0
R/W
X
0
SPI Mode
LSB
MSB
Undefined
0
1
2
3
SPDR
Figure
184
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