ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 341

• Manufacturer Part Number: ATxmega128B1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B1

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 53
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Segment Lcd: 160
• 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
• 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: 3
• Output Compare Channels: 10
• Input Capture Channels: 10
• Pwm Channels: 10
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

25.15.10 CH0RESH – Channel 0Result Register High
25.15.10.1
25.15.10.2
25.15.10.3
25.15.11 CH0RESL – Channel 0 Result register Low
25.15.11.1
8291A–AVR–10/11
12-bit Mode, Left Adjusted
12-bit Mode, Right Adjusted
8-bit Mode
12-/8-bit Mode
• Bit 3:0 – CAL[11:8]: Calibration value
These are the four msbs of the 12-bit CAL value.
The CH0RESL and CH0RESH register pair represents the 16-bit value, CH0RES. For details on
reading 16-bit registers, refer to
• Bit 7:0 – CHRES[11:4]: Channel Result High
These are the eight msbs of the 12-bit ADC result.
• Bit 7:4 – Reserved
These bits will in practice be the extension of the sign bit, CHRES11, when the ADC works in dif-
ferential mode, and set to zero when the ADC works in signed mode.
• Bit 3:0 – CHRES[11:8]: Channel Result High
These are the four msbs of the 12-bit ADC result.
• Bit 7:0 – Reserved
These bits will in practice be the extension of the sign bit, CHRES7, when the ADC works in
signed mode, and set to zero when the ADC works in single-ended mode.
• Bit 7:0 – CHRES[7:0]: Channel Result Low
These are the eight lsbs of the ADC result.
12-/8-bit, right
12-bit, left
12-bit, left
12-bit, right
8-bit
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
R
R
7
–
–
0
7
0
”Accessing 16-bit Registers” on page
R
R
6
–
–
0
6
0
CHRES[3:0]
R
R
5
–
–
0
5
0
R
R
4
–
–
0
4
0
CHRES[11:4]
Atmel AVR XMEGA B
CHRES[7:0]
R
R
3
–
0
3
–
0
11.
R
R
2
–
0
2
–
0
CHRES[11:8]
R
R
1
–
0
1
–
0
R
R
0
–
0
0
–
0
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