ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 106

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ATxmega16A4

Manufacturer Part Number
ATxmega16A4
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATxmega16A4

Flash (kbytes)
16 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
7
Twi (i2c)
2
Uart
5
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
3.3
Eeprom (bytes)
1024
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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9.4.2
8077H–AVR–12/09
Brown-Out Detection
The Brown-Out Detection (BOD) circuit monitors that the V
trigger level, V
low the trigger level for a minimum time, t
above the trigger level again.
Figure 9-4.
For characterization data on t
by a programmable BODLEVEL setting, see
Table 9-2.
Notes:
The BOD circuit has 3 modes of operation:
• Disabled: In this mode there is no monitoring of the V
• Enabled: In this mode the V
recommended for applications where the power supply is stable.
for at least t
INTERNAL
TIME-OUT
1. The values here are nominal values only. For typical, maximum and minimum numbers consult
2.
RESET
Changing these fuse bits will have no effect until leaving programming mode.
the device data sheet.
V
BOT
CC
Brown-out Detection reset.
Programmable BODLEVEL setting
BOD
. When the BOD is enabled, a BOD reset will be given if the V
will give a brown-out reset.
BODLEVEL[2:0]
111
110
101
100
011
010
001
000
BOD
CC
consult the device data sheet. The trigger level is determined
level is continuously monitored, and a drop in V
(1)
V
BOT-
BOD
Table
t
. The reset is kept active until the V
BOD
9-2.
CC
CC
level, and hence it is only
level is kept above a configurable
V
t
V
TOUT
BOT+
1.6
1.8
2.0
2.2
2.4
2.7
2.9
3.2
BOT
XMEGA A
CC
CC
level falls bel-
CC
below V
UNIT
level rises
V
BOT
106

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