AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 22

• Manufacturer Part Number: AT90PWM81-16SN
• Description: IC MCU AVR 8K FLASH ISP 20SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM81-16SN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SOIC (7.5mm Width)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Timers: 1
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 10 bit, 1 Channel
• Height: 2.35 mm
• Length: 13 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 7.6 mm
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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