ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 29

• 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

4.15.12
8331A–AVR–07/11
LOCKBITS – Nonolatile Memory Lock Bit Register
• Bit 5:2 – 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 1 – EELOAD: EEPROM Page Buffer Active Loading
The EELOAD flag indicates that the temporary EEPROM page buffer has been loaded with one
or more data bytes. It remains set until an EEPROM page write or a page buffer flush operation
is executed. For more details see
• Bit 0 – FLOAD: Flash Page Buffer Active Loading
The FLOAD flag indicates that the temporary flash page buffer has been loaded with one or
more data bytes. It remains set until an application boot page write page buffer flush operation is
executed. For more details see
This register is a mapping of the NVM lockbits into the I/O memory space, enable direct read
access from the application software. Refer to
ter” on page 34
Bit
+0x07
Read/Write
Initial Value
for description.
R
7
1
BLBB[1:0]
R
6
1
”Flash and EEPROM Programming Sequences” on page
”Flash and EEPROM Programming Sequences” on page
R
5
1
BLBA[1:0]
R
4
1
”LOCKBITS – Nonolatile Memory Lock Bit Regis-
Atmel AVR XMEGA AU
R
3
1
BLBAT[1:0]
2
R
1
R
1
1
LB[1:0]
R
0
1
LOCKBITS
430.
430.
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