AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 259
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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21.7.8
21.7.9
21.7.10
7734P–AVR–08/10
Programming the Fuse Low Bits
Programming the Fuse High Bits
Programming the Extended Fuse Bits
The algorithm for programming the Fuse Low bits is as follows (refer to
page 256
The algorithm for programming the Fuse High bits is as follows (refer to
page 256
The algorithm for programming the Extended Fuse bits is as follows (refer to
page 256
Figure 21-5.
4.
5.
1.
2.
3.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
RESET +12V
Set OE to “0”, and BS1 to “0”. The EEPROM Data byte can now be read at DATA.
Set OE to “1”.
A: Load Command “0100 0000”.
C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
Give WR a negative pulse and wait for RDY/BSY to go high.
A: Load Command “0100 0000”.
C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
Set BS1 to “1” and BS2 to “0”. This selects high data byte.
Give WR a negative pulse and wait for RDY/BSY to go high.
Set BS1 to “0”. This selects low data byte.
1. A: Load Command “0100 0000”.
2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.
3. Set BS1 to “0” and BS2 to “1”. This selects extended data byte.
4. Give WR a negative pulse and wait for RDY/BSY to go high.
5. Set BS2 to “0”. This selects low data byte.
PAGEL/BS1
RDY/BSY
XA1/BS2
for details on Command and Data loading):
for details on Command and Data loading):
for details on Command and Data loading):
XTAL1
DATA
XA0
WR
OE
Programming the FUSES Waveforms
0x40
A
DATA
C
Write Fuse Low byte
XX
0x40
A
DATA
C
Write Fuse high byte
XX
0x40
A
“Programming the Flash” on
“Programming the Flash” on
“Programming the Flash” on
AT90PWM81
DATA
C
Write Extended Fuse byte
XX
259
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