ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 88

• Manufacturer Part Number: ATxmega16A4
• Manufacturer: Atmel Corporation

Specifications of ATxmega16A4

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Speed: No
• Usb Interface: No
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 3.3
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

7.10.2
7.10.3
8077H–AVR–12/09
STATUS - Oscillator Status Register
XOSCCTRL - XOSC Control Register
• Bit 7:5 - Reserved
These bits are reserved and will always be read as zero. For compatibility with future devices,
always write these bits to zero when this register is written.
• Bit 4 - PLLRDY: PLL Ready
The PLLRDY flag is set when the PLL has locked on selected frequency and ready to be used
as he System Clock source.
• Bit 3 - XOSCRDY: External clock source Ready
The XOSCRDY flag is set when the external clock source is stable and ready to be used as the
System Clock source.
• Bit 2 - RC32KRDY: 32.768 kHz Internal RC Oscillator Ready
The RC32KRDY flag is set when the 32.768 kHz internal RC oscillator is stable and ready to be
used as the System Clock source.
• Bit 1 - RC32MRDY: 32 MHz Internal RC Oscillator Ready
The R32MRFY flag is set when the 32 MHz internal RC oscillator is stable and ready to be used
as the System Clock source.
• Bit 0 - RC2MRDY: 2 MHz Internal RC Oscillator Ready
The RC2MRDY flag is set when the 2 MHz internal RC oscillator is stable and is ready to be
used as the System Clock source.
• Bit 7:6 - FRQRANGE[1:0]: Crystal Oscillator Frequency Range Select
These bits select the frequency range for the connected crystal oscillator according to
on page
Bit
+0x02
Read/Write
Initial Value
Bit
+0x01
Read/Write
Initial Value
89.
R/W
FRQRANGE[1:0]
R
7
0
7
0
-
R/W
R
6
0
-
6
0
X32KLPM
R
5
0
-
R/W
5
0
PLLRDY
R
4
0
R
4
0
-
XOSCRDY
R
3
0
R/W
3
0
RC32KRDY
R/W
R
2
0
2
0
XOSCSEL[3:0]
R32MRDY
R/W
1
0
R
1
0
XMEGA A
RC2MRDY
R/W
0
0
R
0
0
Table 7-5
XOSCCTRL
STATUS
88