ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 107

• Manufacturer Part Number: ATxmega32A4U
• Manufacturer: Atmel Corporation

Specifications of ATxmega32A4U

• Flash (kbytes): 32 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 Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• 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): 4
• 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
8.6.1
8.7
8.7.1
8331A–AVR–07/11
Register Description – Sleep
Register Description – Power Reduction
CTRL – Sleep Control Register
PRGEN – General Power Reduction Register
• Bit 7:4 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 3:1 – SMODE[2:0]: Sleep Mode Selection
These bits select sleep modes according to
Table 8-2.
• Bit 0 – SEN: Sleep Enable
This bit must be set to make the MCU enter the selected sleep mode when the SLEEP instruc-
tion is executed. To avoid unintentional entering of sleep modes, it is recommended to write
SEN just before executing the SLEEP instruction and clear it immediately after waking up.
Bit
+0x00
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
SMODE[2:0]
000
001
010
011
100
101
110
111
R
R
7
–
0
7
–
0
Sleep mode
USB
R/W
R
6
0
6
–
0
R
R
5
–
0
5
–
0
Group Configuration
ESTDBY
PDOWN
STDBY
PSAVE
IDLE
AES
R/W
R
—
—
—
4
–
0
4
0
Table 8-2 on page
R/W
R/W
EBI
Atmel AVR XMEGA AU
3
0
3
0
SMODE[2:0]
RTC
R/W
R/W
2
0
2
0
107.
Description
Idle mode
Reserved
Power-down mode
Power-save mode
Reserved
Reserved
Standby mode
Extended standby mode
EVSYS
R/W
R/W
1
0
1
0
DMA
SEN
R/W
R/W
0
0
0
0
PRGEN
CTRL
107