AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 22

• 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

4.4
22
Fuse Bits
AT90PWM81
The order the different bits and registers should be accessed is:
1
2
3
4
5
a.
EECR (within four cycles after EEMPE has been written) to start a program operation. The temporary
EEPROM page buffer will auto-erase after program operation is completed.
OR
b.
0b11 and trigger the flushing by writing EEPE (within four cycles after EEMPE has been written).
The AT90PWM81 has three Fuse bytes.
fuses and how they are mapped into the Fuse bytes. Note that the fuses are read as logical zero, “0”, if they
are programmed.
Table 4-3.
Notes:
Extended Fuse Byte
PSC2RB
PSC2RBA
PSCRRB
PSCRV
PSCINRB
BODLEVEL2
BODLEVEL1
BODLEVEL0
Write EEPAGE in EECR (loading of temporary EEPROM buffer is enabled)
Write the address bits needed to address bytes within a page into EEARL
Write data to EEDR
Repeat 2 and 3 above until the buffer is filled up or until all data is loaded
Write the remaining address bits into EEARH:EEARL
Select which programming mode that should be executed (EEPMn bits). Write the EEPE bit in
If an error situation occurred and the loading should be terminated by software: Write EEPM1:0 to
1. See
(1)
(1)
(1)
Extended Low Fuse Byte
Table 7-2 on page 52
Bit No
7
6
5
4
3
2
1
0
for BODLEVEL Fuse decoding
Table 4-3
Description
PSC2 Reset Behavior
PSC2 Reset Behavior for
OUT22 & 23
PSC Reduced Reset Behavior
PSCOUT & PSCOUTR Reset
Value
PSC & PSCR Inputs Reset
Behavior
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
-
Table 4-5
describe briefly the functionality of all the
Default Value
1
1
1
1
1
1 (unprogrammed)
0 (programmed)
1 (unprogrammed)
7734P–AVR–08/10