ATxmega64A3U Atmel Corporation, ATxmega64A3U Datasheet - Page 343

• Manufacturer Part Number: ATxmega64A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega64A3U

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.10 Register Description
27.10.1
8331A–AVR–07/11
CTRL – EBI Control Register
• Bit 7:6 – SDDATAW[1:0]: SDRAM Data Width Setting
These bits select the EBI SDRAM data width configuration according to
Table 27-8.
Note:
• Bit 5:4 – LPCMODE[1:0]: SRAM Low Pin-count Mode
These bits select the EBI SRAM LPC configuration according to
Table 27-9.
• Bit 3:2 – SRMODE[1:0]: SRAM Mode
These bits selects the EBI SRAM configuration according to
Table 27-10. SRAM Mode
Note:
Bit
+0x00
Read/Write
Initial Value
LPCMODE[1:0]
SDDATAW[1:0]
SRMODE[1:0]
1. 8-bit data bus only available for 4-port EBI interface
1. ALE2 and NOALE only available with 4-port EBI interface
00
01
10
11
00
01
10
11
00
01
10
11
–
EBI
SDRAM Mode
SRAM LPC Mode
R/W
SDDATAW[1:0]
7
0
Group Configuration
4BIT
8BIT
—
—
Group Configuration
ALE1
—
ALE12
—
Group Configuration
ALE1
ALE2
ALE12
NOALE
R/W
(1)
(1)
6
0
(1)
R/W
LPCMODE[1:0]
5
0
R/W
ALE
ALE1
ALE2
ALE1 & 2
No ALE
4
0
Description
4 bit data bus
8 bit data bus
Reserved
Reserved
ALE
ALE1
—
ALE1 & 2
—
Atmel AVR XMEGA AU
R/W
SRMODE[1:0]
3
0
Description
Address byte 0 and 1 multiplexed
Address byte 0 and 2 multiplexed
Address byte 0, 1 and 2 multiplexed
No address multiplexing
Description
Data multiplexed with Address byte 0
Reserved
Data multiplexed with Address byte 0 and 1
Reserved
Table 27-10 on page
R/W
2
0
Table 27-9 on page 343
R/W
1
0
IFMODE[1:0]
Table 27-8 on page
R/W
0
0
343.
CTRL
343.
343