AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 35

• Manufacturer Part Number: AT90PWM216
• Manufacturer: Atmel Corporation

Specifications of AT90PWM216

• Flash (kbytes): 16 Kbytes
• Pin Count: 24
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 19
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 105
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 12
• Input Capture Channels: 1
• Pwm Channels: 7
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

7.6.2
7710F–AVR–09/11
PLL Control and Status Register – PLLCSR
Figure 7-3.
• Bit 7..3 – Res: Reserved Bits
These bits are reserved bits in the AT90PWM216/316 and always read as zero.
• Bit 2 – PLLF: PLL Factor
The PLLF bit is used to select the division factor of the PLL.
If PLLF is set, the PLL output is 64Mhz.
If PLLF is clear, the PLL output is 32Mhz.
• Bit 1 – PLLE: PLL Enable
When the PLLE is set, the PLL is started and if not yet started the internal RC Oscillator is
started as PLL reference clock. If PLL is selected as a system clock source the value for this bit
is always 1.
• Bit 0 – PLOCK: PLL Lock Detector
When the PLOCK bit is set, the PLL is locked to the reference clock, and it is safe to enable
CLK
Bit
$29 ($29)
Read/Write
Initial Value
PLL
XTAL1
XTAL2
for PSC. After the PLL is enabled, it takes about 100 ms for the PLL to lock.
RC OSCILLATOR
OSCCAL
8 MHz
PCK Clocking System AT90PWM216/316
OSCILLATORS
R
7
–
0
R
6
–
0
CKSEL3..0
R
5
–
0
DIVIDE
BY 8
R
4
–
0
PLLE
PLL
64x
R
3
–
0
Detector
Lock
DIVIDE
DIVIDE
PLLF
PLLF
BY 2
BY 4
R/W
AT90PWM216/316
2
0
PLLE
R/W
0/1
1
PLOCK
CLK
PLOCK
R
0
0
CK
PLL
SOURCE
PLLCSR
35