AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 186
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
Specifications of AT90PWM81
Flash (kbytes)
8 Kbytes
Pin Count
20
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
20
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
3
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.25
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
Output Compare Channels
8
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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14.5
14.5.1
186
SPI registers
AT90PWM81
SPI Control Register – SPCR
Figure 14-3.
Figure 14-4.
• Bit 7 – SPIE: SPI Interrupt Enable
This bit causes the SPI interrupt to be executed if SPIF bit in the SPSR Register is set and the if the Global
Interrupt Enable bit in SREG is set.
• Bit 6 – SPE: SPI Enable
When the SPE bit is written to one, the SPI is enabled. This bit must be set to enable any SPI operations.
Bit
Read/Write
Initial Value
7
SPIE
R/W
0
SCK (CPOL = 0)
mode 0
SCK (CPOL = 1)
mode 2
SAMPLE I
MOSI/MISO
CHANGE 0
MOSI PIN
CHANGE 0
MISO PIN
SCK (CPOL = 0)
mode 1
SCK (CPOL = 1)
mode 3
SAMPLE I
MOSI/MISO
CHANGE 0
MOSI PIN
CHANGE 0
MISO PIN
SPI Transfer Format with CPHA = 0
SS
SPI Transfer Format with CPHA = 1
SS
MSB first (DORD = 0)
LSB first (DORD = 1)
MSB first (DORD = 0)
LSB first (DORD = 1)
6
SPE
R/W
0
MSB
LSB
5
DORD
R/W
0
MSB
LSB
Bit 6
Bit 1
4
MSTR
R/W
0
Bit 6
Bit 1
Bit 5
Bit 2
Bit 5
Bit 2
3
CPOL
R/W
0
Bit 4
Bit 3
Bit 4
Bit 3
CPHA
2
R/W
0
Bit 3
Bit 4
Bit 3
Bit 4
1
SPR1
R/W
0
Bit 2
Bit 5
Bit 2
Bit 5
Bit 1
Bit 6
0
SPR0
R/W
0
Bit 1
Bit 6
7734P–AVR–08/10
LSB
MSB
SPCR
LSB
MSB
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