AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 40

• 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

5.5.3
40
AT90PWM81
PLL Control and Status Register – PLLCSR
Table 5-10.
• Bit 7..3 – Res: Reserved Bits
These bits are reserved bits in the AT90PWM81 and always read as zero.
• Bit 5..2-– PLLF: PLL Factor
The PLLF bits is used to select the multiplication factor of the PLL
.
Table 5-11.
Note:
Bit
$29 ($29)
Read/Write
Initial Value
CLKPS3
PLLF3..0
1
1
1
1
1
1
1
1
PLLF3 is used for debug purpose (must be wired)
7-F
0-1
6
5
4
3
2
7
–
R
0
PLL multiplication factor
Clock Prescaler Select (Continued)
CLKPS2
0
0
0
0
1
1
1
1
6
–
R
0
N+2
8
7
6
5
4
CLKPS1
5
PLLF3
R/W
0
0
0
1
1
0
0
1
1
4
PLLF2
R/W
1
CLKPS0
0
1
0
1
0
1
0
1
3
PLLF1
R/W
0
2
PLLF0
R/W
0
PLL frequency MHz
Reserved
Reserved
Clock Division Factor
1
PLLE
R/W
0/1
64
56
48
40
32
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
256
0
PLOCK
R
0
7734P–AVR–08/10
PLLCSR