ATA5773-PXQW Atmel, ATA5773-PXQW Datasheet - Page 27

XMITTR UHF ASK/FSK 310MHZ 24VQFN

ATA5773-PXQW

Manufacturer Part Number
ATA5773-PXQW
Description
XMITTR UHF ASK/FSK 310MHZ 24VQFN
Manufacturer
Atmel
Datasheet

Specifications of ATA5773-PXQW

Frequency
310MHz ~ 350MHz
Modulation Or Protocol
UHF
Power - Output
8dBm
Voltage - Supply
2 V ~ 4 V
Current - Transmitting
9.8mA
Data Interface
PCB, Surface Mount
Memory Size
4kB Flash, 256B EEPROM, 256B SRAM
Antenna Connector
PCB, Surface Mount
Operating Temperature
-40°C ~ 85°C
Package / Case
24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
Processor Series
ATA5x
Core
AVR8
Data Bus Width
8 bit
Program Memory Type
Flash
Program Memory Size
4 KB
Data Ram Size
256 B
Interface Type
SPI, USI
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
12
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 12 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Applications
-
Sensitivity
-
Data Rate - Maximum
-
Current - Receiving
-
Lead Free Status / Rohs Status
 Details

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Part Number
Manufacturer
Quantity
Price
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ATA5773-PXQW
Manufacturer:
ATMEL
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4.8.3.6
9137E–RKE–12/10
Preventing EEPROM Corruption
The next code examples show assembly and C functions for reading the EEPROM. The
examples assume that interrupts are controlled so that no interrupts will occur during execu-
tion of these functions.
Note:
During periods of low V
too low for the CPU and the EEPROM to operate properly. These issues are the same as for
board level systems using EEPROM, and the same design solutions should be applied.
An EEPROM data corruption can be caused by two situations when the voltage is too low.
First, a regular write sequence to the EEPROM requires a minimum voltage to operate cor-
rectly. Secondly, the CPU itself can execute instructions incorrectly, if the supply voltage is too
low.
EEPROM data corruption can easily be avoided by following this design recommendation:
Keep the Atmel
age. This can be done by enabling the internal Brown-out Detector (BOD). If the detection
level of the internal BOD does not match the needed detection level, an external low V
protection circuit can be used. If a reset occurs while a write operation is in progress, the write
operation will be completed provided that the power supply voltage is sufficient.
Assembly Code Example
C Code Example
EEPROM_read:
unsigned char EEPROM_read(unsigned char ucAddress)
{
}
; Wait for completion of previous write
sbic EECR,EEPE
rjmp EEPROM_read
; Set up address (r17) in address register
out EEARL, r17
; Start eeprom read by writing EERE
sbi EECR,EERE
; Read data from data register
in
ret
/* Wait for completion of previous write */
while(EECR & (1<<EEPE))
/* Set up address register */
EEARL = ucAddress;
/* Start eeprom read by writing EERE */
EECR |= (1<<EERE);
/* Return data from data register */
return EEDR;
The code examples are only valid for the Atmel ATtiny44V, using 8-bit addressing mode.
;
r16,EEDR
®
AVR
®
CC
RESET active (low) during periods of insufficient power supply volt-
, the EEPROM data can be corrupted because the supply voltage is
Atmel ATA5771/73/74
CC
reset
27

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