AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 258
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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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90PWM81-16MF
Manufacturer:
Atmel
Quantity:
3 118
Company:
Part Number:
AT90PWM81-16MN
Manufacturer:
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Quantity:
2 446
Company:
Part Number:
AT90PWM81-16SF
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Company:
Part Number:
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Manufacturer:
Atmel
Quantity:
1 500
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21.7.6
21.7.7
258
AT90PWM81
Reading the Flash
Reading the EEPROM
K: Repeat 3 through 5 until the entire buffer is filled.
L: Program EEPROM page
Figure 21-4.
The algorithm for reading the Flash memory is as follows (refer to
for details on Command and Address loading):
The algorithm for reading the EEPROM memory is as follows (refer to
256
1.
2.
3.
4.
5.
1.
2.
3.
1.
2.
3.
4.
5.
6.
1.
2.
3.
for details on Command and Address loading):
RESET +12V
A: Load Command “0001 0001”.
G: Load Address High Byte (0x00 - 0xFF).
B: Load Address Low Byte (0x00 - 0xFF).
C: Load Data (0x00 - 0xFF).
E: Latch data (give PAGEL a positive pulse).
Set BS1 to “0”.
Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY goes low.
Wait until to RDY/BSY goes high before programming the next page (See
nal waveforms).
A: Load Command “0000 0010”.
G: Load Address High Byte (0x00 - 0xFF).
B: Load Address Low Byte (0x00 - 0xFF).
Set OE to “0”, and BS1 to “0”. The Flash word low byte can now be read at DATA.
Set BS1 to “1”. The Flash word high byte can now be read at DATA.
Set OE to “1”.
A: Load Command “0000 0011”.
G: Load Address High Byte (0x00 - 0xFF).
B: Load Address Low Byte (0x00 - 0xFF).
PAGEL/BS1
RDY/BSY
XA1/BS2
XTAL1
DATA
XA0
WR
OE
Programming the EEPROM Waveforms
0x11
A
ADDR. HIGH
G
ADDR. LOW
B
DATA
C
XX
E
ADDR. LOW
B
DATA
C
K
“Programming the Flash” on page 256
XX
“Programming the Flash” on page
E
L
Figure 21-4
7734P–AVR–08/10
for sig-
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