ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 334

• 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

27.5.3
27.5.4
8331A–AVR–07/11
Multiplexing address byte 0 and 2
Multiplexing address byte 0, 1and 2
Figure 27-4. Multiplexed SRAM connection using ALE1
When address byte 0 (A[7:0]) and address byte 2 (A[23:16) are multiplexed, they are output
from the same port, and the ALE2 signal from the device control the address latch.
Figure 27-5. Multiplexed SRAM connection using ALE2
When address byte 0 (A[7:0]), address byte 1 (A[15:8]) and address byte 2 (A[23:16] are multi-
plexed, they are output from the same port, and the ALE1 and ALE2 signal from the device
control the external address latches.
Figure 27-6. Multiplexed SRAM connection using ALE1 and ALE2
EBI
EBI
EBI
A[23:16]/
A[23:16]/
A[19:16]
A[15:8]/
A[15:8]/
A[15:8]
D[7:0]
D[7:0]
D[7:0]
A[7:0]
A[7:0]
A[7:0]
ALE1
ALE2
ALE1
ALE2
D
G
D
G
Q
Q
D
G
D
G
Atmel AVR XMEGA AU
Q
Q
D[7:0]
A[7:0]
A[15:8]
A[19:16]
D[7:0]
A[7:0]
A[15:8]
A[23:16]
D[7:0]
A[7:0]
A[15:8]
A[23:16]
SRAM
SRAM
SRAM
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