ATxmega128A1 Atmel Corporation, ATxmega128A1 Datasheet - Page 121
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ATxmega128A1
Manufacturer Part Number
ATxmega128A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A1
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
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
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
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
8
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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11.7.3
8077H–AVR–12/09
STATUS – Watchdog Status Register
Table 11-2.
• Bit 1 - WEN: Watchdog Window Mode Enable
This bit enables the Watchdog Window Mode. In order to change this bit the WCEN bit in
”WINCTRL – Window Mode Control Register” on page 120
time. This bit is protected by the Configuration Change Protection mechanism, for detailed
description refer to
• Bit 0 - WCEN: Watchdog Window Mode Change Enable
This bit enables the possibility to change the configuration of the
Control Register” on page
to one at the same time for the changes to take effect. This bit is protected by the Configuration
Change Protection mechanism, but not protected by the WDT lock fuse.
• Bit 7:1 - Res:Reserved
These bits are reserved and will always be read as zero. For compatibility with future devices,
always write these bits to zero when this register is written.
• Bit 0 - SYNCBUSY
When writing to the CTRL or WINCTRL registers, the WDT needs to be synchronized to the
other clock domains. During synchronization the SYNCBUSY bit will be read as one. This bit is
automatically cleared after the synchronization is finished. Synchronization will only take place
when the ENABLE bit for the Watchdog Timer is set.
Bit
+0x02
Read/Write
Initial Value
WPER[3:0]
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Watchdog closed window periods (Continued)
R
7
0
-
Section 3.12 ”Configuration Change Protection” on page
R
6
0
-
120. When writing a new value to this register, this bit must be written
Group Configuration
R
5
0
-
500CLK
1KCLK
2KCLK
4KCLK
8KCLK
R
4
0
-
3
R
0
-
must be written to one at the same
2
R
0
-
Typical closed window periods
”WINCTRL – Window Mode
R
1
0
-
Reserved
Reserved
Reserved
Reserved
Reserved
0.5 s
1.0 s
2.0 s
4.0 s
8.0 s
SYNCBUSY
12.
XMEGA A
R
0
0
STATUS
121
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