ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 99

• 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

8.6.2
8.6.3
8077H–AVR–12/09
PRPA/B - Power Reduction Port A/B Register
PRPC/D/E/F - Power Reduction Port C/D/E/F Register
Note:
• Bit 7:3 - 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 2 - DAC: Power Reduction DAC
Setting this bit stops the clock to the DAC. The DAC should be disabled before shut down.
• Bit 1 - ADC: Power Reduction ADC
Setting this bit stops the clock to the ADC. The ADC should be disabled before shut down.
• Bit 0 - AC: Power Reduction Analog Comparator
Setting this bit stops the clock to the Analog Comparator. The AC should be disabled before shut
down.
• Bit 7 - Reserved
This bit is reserved and will always be read as zero. For compatibility with future devices, always
write this bit to zero when this register is written.
• Bit 6 - TWI: Two-Wire Interface
Setting this bit stops the clock to the Two-Wire Interface. When the bit is cleared the peripheral
should be reinitialized to ensure proper operation.
• Bit 5 - USART1
Setting this bit stops the clock to the USART1. When the bit is cleared the peripheral should be
reinitialized to ensure proper operation.
• Bit 4 - USART0
Setting this bit stops the clock to the USART0. When the bit is cleared the peripheral should be
reinitialized to ensure proper operation.
Bit
+0x01/+0x02
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Disabling of analog modules stops the clock to the analog blocks themselves and not only the
interfaces.
R
7
0
-
R
7
0
-
TWI
R/W
6
0
R
6
0
-
USART1
R/W
5
0
R
5
0
-
USART0
R/W
4
0
R
4
0
-
R/W
SPI
3
0
3
R
0
-
HIRES
R/W
DAC
R/W
2
0
2
0
TC1
R/W
ADC
R/W
1
0
1
0
XMEGA A
TC0
R/W
R/W
0
0
AC
0
0
PRPC/D/E/F
PRPA/B
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