ATxmega128A3 Atmel Corporation, ATxmega128A3 Datasheet - Page 307
ATxmega128A3
Manufacturer Part Number
ATxmega128A3
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A3
Flash (kbytes)
128 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 Speed
No
Usb Interface
No
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)
8
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
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25.16.7
25.16.8
25.16.9
25.16.10 CHnRESH - ADC Channel n Result register High
8077H–AVR–12/09
TEMP - ADC Temporary register
CALL - ADC Calibration value registers
CALH - ADC Calibration value registers
• Bits 7:0 - TEMP[7:0]: ADC Temporary Register
This register is used when reading 16-bit registers in the ADC controller. The high byte of the 16-
bit register is stored here when the low byte read by the CPU. This register can also be read and
written from the user software.
For more details on 16-bit register access refer to
page
The CALL and CALH register pair hold the 12-bit value ADC calibration value CAL. The ADC is
calibrated during production programming, the calibration value must be read from the signature
row and written to the CAL register from software.
• Bits 7:0 - CAL[7:0]: ADC Calibration value
This is the 8 LSB of the 12-bit CAL value.
• Bits 7:0 - CAL[11:8]: ADC Calibration value
This is the 4 MSB of the 12-bit CAL value.
The CHnRESL and CHnRESH register pair represents the 16-bit value CHnRES. For details on
reading 16-bit register refer to
12-bit, left
12-bit, right
8-bit
Bit
+0x07
Read/Write
Initial Value
Bit
+0x0C
Read/Write
Initial Value
Bit
+0x0D
Read/Write
Initial Value
12.
Bit
Read/Write
Initial Value
R/W
7
0
R/W
R/W
7
0
7
0
-
R/W
6
0
R/W
R/W
6
0
6
0
-
R
7
0
-
-
Section 3.11 ”Accessing 16-bits Registers” on page
R/W
5
0
R/W
R/W
5
0
5
0
-
R
6
0
-
-
R/W
4
0
R/W
R/W
4
0
4
0
-
R
5
0
-
-
TEMP[7:0]
CAL[7:0]
Section 3.11 ”Accessing 16-bits Registers” on
R/W
R/W
R/W
3
0
3
0
3
0
R
4
0
-
-
CHRES[11:4]
R/W
R/W
R/W
2
0
2
0
2
0
R
3
0
-
CAL[11:8]
R/W
R/W
R/W
1
0
1
0
1
0
R
2
0
-
CHRES[11:8]
XMEGA A
R/W
R/W
R/W
0
0
0
0
0
0
R
1
0
-
12.
TEMP
CAL
CAL
R
0
0
-
307
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