ATA6612P-PLPW Atmel, ATA6612P-PLPW Datasheet - Page 19
![MCU W/LIN TXRX REG WTCHDG 48-QFN](/photos/6/82/68297/48-qfn_sml.jpg)
ATA6612P-PLPW
Manufacturer Part Number
ATA6612P-PLPW
Description
MCU W/LIN TXRX REG WTCHDG 48-QFN
Manufacturer
Atmel
Series
AVR® ATA66 LIN-SBCr
Datasheet
1.ATA6612-EK.pdf
(364 pages)
Specifications of ATA6612P-PLPW
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
48-QFN Exposed Pad
Processor Series
ATA6x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
SPI, TWI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
23
Number Of Timers
3
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Figure 3-9.
3.3.24.2
9111H–AUTO–01/11
NTRIG
NRES
VCC
Worst Case Calculation with R
Timing Sequence with R
Undervoltage Reset
t
reset
= 4ms
The internal oscillator has a tolerance of 20%. This means that t
The worst case calculation for the watchdog period t
The ideal watchdog time t
t
t
t
t
t
t
A microcontroller with an oscillator tolerance of ±15% is sufficient to supply the trigger inputs
correctly.
Table 3-2.
2
1,min
2,min
wdmax
wdmin
wd
.
R
WD_OSC
= 29.3ms ±4.5ms (±15%)
120
k
34
51
91
= 0.8
= 0.8
= t
= t
1max
1min
WD_OSC
Oscillator
+ t
= 24.8ms
t
t
1
2
Period
t
Typical Watchdog Timings
19.61
33.54
42.84
osc
= 16.5ms, t
= 17.3ms, t
t
WO_OSC
2min
13.3
d
= 155ms
/µs
= 51k
t
= 16.5ms + 17.3ms = 33.8ms
trig
> 200ns
= 51k
t
1
264.80
338.22
t
154.8
wd
Lead
Time
= 20.6ms
d
105
1,max
2,max
/ms
is between the maximum t
= 1.2
= 1.2
Window
t
Closed
wd
20.64
35.32
45.11
t
14.0
1
/ms
t
2
t
t
1
2
= 21ms
= 24.8ms
= 26ms
Atmel ATA6612/ATA6613
Open Window
t
21.67
37.06
47.34
14.7
2
t
1
/ms
wd
1
is calculated as follows.
and the minimum t
from Microcontroller
1
t
2
and t
Trigger Period
t
29.32
50.14
64.05
Watchdog Reset
wd
19.9
2
/ms
can also vary by 20%.
t
nres
1
= 4ms
plus the minimum
Reset Time
t
nres
4
4
4
4
/ms
19
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