ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 53

• Manufacturer Part Number: ATA5773-DK1
• Description: BOARD XMITTER FOR ATA5773 315MHZ
• Manufacturer: Atmel
• Type: Transmitterr

Specifications of ATA5773-DK1

• Frequency: 315MHz
• Maximum Frequency: 315 MHz
• Supply Voltage (max): 4 V
• Supply Voltage (min): 2 V
• Supply Current: 9 mA
• Product: RF Development Tools
• For Use With/related Products: ATA5773
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9137E–RKE–12/10
In safety level 1, WDE is overridden by WDRF in MCUSR. See
MCU Status Register” on page 51
set when WDRF is set. To clear WDE, WDRF must be cleared before disabling the Watchdog
with the procedure described above. This feature ensures multiple resets during conditions
causing failure, and a safe start-up after the failure.
Note:
• Bits 5, 2..0 – WDP3..0: Watchdog Timer Prescaler 3, 2, 1, and 0
The WDP3..0 bits determine the Watchdog Timer prescaling when the Watchdog Timer is
enabled. The different prescaling values and their corresponding Timeout Periods are shown
in
Table 4-18.
WDP3
Table 4-18 on page
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
If the watchdog timer is not going to be used in the application, it is important to go through a
watchdog disable procedure in the initialization of the device. If the Watchdog is accidentally
enabled, for example by a runaway pointer or brown-out condition, the device will be reset,
which in turn will lead to a new watchdog reset. To avoid this situation, the application software
should always clear the WDRF flag and the WDE control bit in the initialization routine.
WDP2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Watchdog Timer Prescale Select
WDP1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
53.
WDP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
for description of WDRF. This means that WDE is always
Number of WDT Oscillator
1024K cycles
128K cycles
256K cycles
512K cycles
16K cycles
32K cycles
64K cycles
2K cycles
4K cycles
8K cycles
Cycles
Atmel ATA5771/73/74
Reserved
Section 4.11.5.1 “MCUSR –
Typical Time-out at
V
CC
0.125 s
16 ms
32 ms
64 ms
0.25 s
8.0 s
0.5 s
1.0 s
2.0 s
4.0 s
= 5.0V
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