ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 201

• 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

16.3
16.3.1
16.4
8291A–AVR–10/11
Address
+0x00
Register Description
Register Summary
CTRLA – Control register A
Name
CTRLA
The hi-res extension will not output any pulse shorter than one peripheral clock cycle; i.e., a
compare value lower than four will have no visible output.
• Bit 7:3 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 2 – HRPLUS: High Resolution Plus
Setting this bit enables high resolution plus. Hi-res plus is the same as hi-res, but will increase
the resolution by eight (3 bits) instead of four.
The extra resolution is achieved by operating at both edges of the peripheral 4x clock.
• Bit 1:0 – HREN[1:0]: High Resolution Enable
These bits enables the high-resolution mode for a timer/counter according to
Setting one or both HREN bits will enable high-resolution waveform generation output for the
entire general purpose I/O port. This means that both timer/counters connected to the same port
must enable hi-res if both are used for generating PWM or FRQ output on pins.
Table 16-1.
Bit
+0x00
Read/Write
Initial Value
Bit 7
–
HREN[1:0]
High Resolution Enable
00
01
10
11
Bit 6
R
7
–
0
–
R
6
–
0
Bit 5
–
High Resolution Enabled
None
Timer/counter 0
Timer/counter 1
Both timer/counters
R
5
–
0
Bit 4
–
R
4
–
0
Bit 3
–
R
3
–
0
Atmel AVR XMEGA B
HRPLUS
Bit 2
HRPLUS
R/W
2
0
Bit 1
R/W
1
0
HREN[1:0]
HREN[1:0]
Table
R/W
Bit 0
0
0
16-1.
CTRLA
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