ATA6613-EK Atmel, ATA6613-EK Datasheet - Page 19

• Manufacturer Part Number: ATA6613-EK
• Description: BOARD DEMO LIN-MCM FOR ATA6613
• Manufacturer: Atmel

Specifications of ATA6613-EK

• Main Purpose: Interface, LIN + MCU
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6613
• Primary Attributes: LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
• Secondary Attributes: 16 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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