AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 252

• 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

21.2.3
21.3
21.3.1
21.4
21.5
21.5.1
252
Signature Bytes
Calibration Byte
Parallel Programming Parameters, Pin Mapping, and Commands
AT90PWM81
Latching of Fuses
Signature Bytes
Signal Names
The fuse values are latched when the device enters programming mode and changes of the fuse values will
have no effect until the part leaves Programming mode. This does not apply to the EESAVE Fuse which
will take effect once it is programmed. The fuses are also latched on Power-up in Normal mode.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This code can be
read in both serial and parallel mode, also when the device is locked. The three bytes reside in a separate
address space, the signature row.
For the AT90PWM81 the signature bytes are:
The AT90PWM81 has a byte calibration value for the internal RC Oscillator. This byte resides in the byte
of address 0x003 in the signature address space. During reset, this byte is automatically written into the
OSCCAL Register to ensure correct frequency of the calibrated RC Oscillator.
This section describes how to parallel program and verify Flash Program memory, EEPROM Data mem-
ory, Memory Lock bits, and Fuse bits in the AT90PWM81. Pulses are assumed to be at least 250 ns unless
otherwise noted.
In this section, some pins of the AT90PWM81 are referenced by signal names describing their functional-
ity during parallel programming, see
are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse. The bit
coding is shown in
When pulsing WR or OE, the command loaded determines the action executed. The different Commands
are shown in
1.
2.
3.
0x000: 0x1E (indicates manufactured by Atmel).
0x002: 0x93 (indicates 8KB Flash memory).
0x004: 0x88 (indicates AT90PWM81 device when 0x002 is 0x93).
Table
Table
21-10.
21-9.
Figure 21-1
and
Table
21-7. Pins not described in the following table
7734P–AVR–08/10