ATxmega64B1 Atmel Corporation, ATxmega64B1 Datasheet - Page 249
ATxmega64B1
Manufacturer Part Number
ATxmega64B1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64B1
Flash (kbytes)
64 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:
ATxmega64B1-AUR
Manufacturer:
ATMEL
Quantity:
210
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19.8
19.8.1
8291A–AVR–10/11
Register Description
CTRL – Common Control Register
• 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 2:1 – SDAHOLD[1:0]: SDA Hold Time Enable.
of SCL.
Table 19-1.
• Bit 0 – EDIEN: External Driver Interface Enable
Setting this bit enables the use of the external driver interface, and clearing this bit enables nor-
mal two-wire mode. See
Table 19-2.
Setting these bits to one enables an internal hold time on SDA with respect to the negative edge
Bit
+0x00
Read/Write
Initial Value
SDAHOLD[1:0]
EDIEN
00
01
10
11
–
0
1
TWI
7
–
R
0
SDA hold time.
External driver interface enable.
Mode
Normal TWI
External driver interface
Group Configuration
OFF
50NS
300NS
400NS
6
–
R
0
Table 19-2 on page 249
R
5
–
0
R
4
–
0
SDA hold time off
Comment
Four-pin interface, standard I/O, no slew rate control,
and no input filter.
Description
Typical 50ns hold time
Typical 100ns hold time
Typical 400ns hold time
Two-pin interface,slew rate control, and input filter.
for details.
R
3
–
0
Atmel AVR XMEGA B
R/W
2
0
SDAHOLD[1:0]
R/W
1
0
EDIEN
R/W
0
0
CTRL
249
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