ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 88
ATxmega128B1
Manufacturer Part Number
ATxmega128B1
Description
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega128B1-AU
Manufacturer:
TI
Quantity:
90
Company:
Part Number:
ATxmega128B1-U
Manufacturer:
FUJITSU
Quantity:
632
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7.9.5
8291A–AVR–10/11
USBSCTRL – USB Control Register
• Bit 0 – RTCEN: RTC and LCD Clock Source Enable
Setting the RTCEN bit enables the selected clock source for the real-time counter (RTC) and
LCD.
• Bit 7:6 – 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 5:3 – USBPSDIV[2:0]: USB Prescaler Division Factor
These bits define the division ratio of the USB clock prescaler according to
88. These bits are locked as long as the USB clock source is enabled.
Table 7-5.
• Bit 2:1 – USBSRC[1:0]: USB Clock Source
These bits select the clock source for the USB module according to
Table 7-6.
Note:
• Bit 0 – USBSEN: USB Clock Source Enable
Setting this bit enables the selected clock source for the USB device module.
Bit
+0x04
Read/Write
Initial Value
USBPSDIV[2:0]
USBSRC[1:0]
1. The 32MHz internal oscillator must be calibrated to 48MHz before selecting this as source for
000
001
010
011
100
101
110
111
00
01
the USB device module. Refer to
R
7
–
0
USB prescaler division factor.
USB clock source.
Group Configuration
Group Configuration
6
–
R
0
RC32M
PLL
16
32
—
—
1
2
4
8
R/W
5
0
USBPSDIV[2:0]
R/W
”DFLL 2MHz and DFLL 32MHz” on page
4
0
Description
No division
Divide by 2
Divide by 4
Divide by 8
Divide by 16
Divide by 32
Reserved
Reserved
Description
PLL
32MHz internal oscillator
R/W
3
0
Atmel AVR XMEGA B
R/W
2
0
USBSRC[1:0]
(1)
Table 7-6 on page
R/W
1
0
Table 7-5 on page
USBSEN
82.
R/W
0
0
USBSCTRL
88.
88
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