ATA5771-PXQW Atmel, ATA5771-PXQW Datasheet - Page 43

• Manufacturer Part Number: ATA5771-PXQW
• Description: XMITTR UHF ASK/FSK 868MHZ 24VQFN
• Manufacturer: Atmel

Specifications of ATA5771-PXQW

• Frequency: 868MHz ~ 928MHz
• 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

4.10.7.1
4.10.7.2
4.10.7.3
4.10.7.4
4.10.7.5
4.10.7.6
9137E–RKE–12/10
Analog to Digital Converter
Analog Comparator
Brown-out Detector
Internal Voltage Reference
Watchdog Timer
Port Pins
If enabled, the ADC will be enabled in all sleep modes. To save power, the ADC should be dis-
abled before entering any sleep mode. When the ADC is turned off and on again, the next
conversion will be an extended conversion. See
page 140
When entering Idle mode, the Analog Comparator should be disabled if not used. When enter-
ing ADC Noise Reduction mode, the Analog Comparator should be disabled. In the other
sleep modes, the Analog Comparator is automatically disabled. However, if the Analog Com-
parator is set up to use the Internal Voltage Reference as input, the Analog Comparator
should be disabled in all sleep modes. Otherwise, the Internal Voltage Reference will be
enabled, independent of sleep mode. See
details on how to configure the Analog Comparator.
If the Brown-out Detector is not needed in the application, this module should be turned off. If
the Brown-out Detector is enabled by the BODLEVEL Fuses, it will be enabled in all sleep
modes, and hence, always consume power. In the deeper sleep modes, this will contribute
significantly to the total current consumption. See
page 48
The Internal Voltage Reference will be enabled when needed by the Brown-out Detection, the
Analog Comparator or the ADC. If these modules are disabled as described in the sections
above, the internal voltage reference will be disabled and it will not be consuming power.
When turned on again, the user must allow the reference to start up before the output is used.
If the reference is kept on in sleep mode, the output can be used immediately. See
4.11.2 “Internal Voltage Reference” on page 49
If the Watchdog Timer is not needed in the application, this module should be turned off. If the
Watchdog Timer is enabled, it will be enabled in all sleep modes, and hence, always consume
power. In the deeper sleep modes, this will contribute significantly to the total current con-
sumption. See
the Watchdog Timer.
When entering a sleep mode, all port pins should be configured to use minimum power. The
most important thing is then to ensure that no pins drive resistive loads. In sleep modes where
both the I/O clock (clk
device will be disabled. This ensures that no power is consumed by the input logic when not
needed. In some cases, the input logic is needed for detecting wake-up conditions, and it will
then be enabled. See the section
page 65
nal is left floating or has an analog signal level close to V
excessive power.
for details on how to configure the Brown-out Detector.
for details on which pins are enabled. If the input buffer is enabled and the input sig-
for details on ADC operation.
Section 4.11.3 “Watchdog Timer” on page 50
I/O
) and the ADC clock (clk
Section 4.14.2.5 “Digital Input Enable and Sleep Modes” on
Section 4.19 “Analog Comparator” on page 137
for details on the start-up time.
Section 4.20 “Analog to Digital Converter” on
Section 4.11.1.4 “Brown-out Detection” on
ADC
Atmel ATA5771/73/74
) are stopped, the input buffers of the
CC
for details on how to configure
/2, the input buffer will use
Section
for
43