AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 182

• Manufacturer Part Number: AT90PWM81
• Manufacturer: Atmel Corporation

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

182
AT90PWM81
When the SPI is enabled, the data direction of the MOSI, MISO, SCK, and SS pins is overridden accord-
ing to
page
Table 14-1.
Note:
The following code examples show how to initialize the SPI as a Master and how to perform a simple
transmission.
DDR_SPI in the examples must be replaced by the actual Data Direction Register controlling the SPI pins.
DD_MOSI, DD_MISO and DD_SCK must be replaced by the actual data direction bits for these pins.
E.g. if MOSI is placed on pin PB2, replace DD_MOSI with DDB2 and DDR_SPI with DDRB.
MOSI
MISO
71.
SCK
Pin
Table
SS
1. See
of the user defined SPI pins.
14-1. For more details on automatic port overrides, refer to
SPI Pin Overrides
“Alternate Functions of Port B” on page 73
Direction, Master SPI
User Defined
Input
User Defined
User Defined
(1)
for a detailed description of how to define the direction
Direction, Slave SPI
User Defined
Input
Input
Input
“Alternate Port Functions” on
7734P–AVR–08/10