ATA3741P3-TGQY Atmel, ATA3741P3-TGQY Datasheet - Page 17

• Manufacturer Part Number: ATA3741P3-TGQY
• Description: IC UHF ASK/FSK RECEIVER 20SOIC
• Manufacturer: Atmel

Specifications of ATA3741P3-TGQY

• Frequency: 300MHz ~ 450MHz
• Sensitivity: -108dBm
• Data Rate - Maximum: 10 kBaud
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, TPM, Security Systems
• Current - Receiving: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Operating Frequency (max): 450000kHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: ATA3741P3-TGQYCT

Figure 5-11. Timing Diagram of the OFF Command Via Pin DATA
Figure 5-12. Timing Diagram of the OFF Command Via Pin ENABLE
5.5
4899B–RKE–10/06
Configuration of the Receiver
DATA (U3741BM)
Serial bi-directional
data line
Out1 (microcontroller)
ENABLE
DATA (U3741BM)
Serial bi-directional
data line
Receiver
The ATA3741 receiver is configured via two 12-bit RAM registers called OPMODE and LIMIT.
The registers can be programmed by means of the bi-directional DATA port. If the register con-
tents have changed due to a voltage drop, this condition is indicated by a certain output pattern
called reset marker (RM). The receiver must be reprogrammed in that case. After a power-on
reset (POR), the registers are set to default mode. If the receiver is operated in default mode,
there is no need to program the registers.
Table 5-2 on page 18
the receiver is set back to polling mode via the OFF command, (see Section
on page
ate register to be programmed.
Table 5-1.
X
on
X
X
X
Receiver on
Bit 1
1
0
0
t1
15) or if it is programmed. Bit 2 represents the register address; it selects the appropri-
OFF command
Effect of Bit 1 and Bit 2 in Programming the Registers
t
off
t2
T
Doze
t3
shows the structure of the registers. As shown in
Bit 2
(Start bit)
x
1
0
t4
Bit 1
("1")
t10
t7
t5
Action
The receiver is set back to polling mode (OFF command)
The OPMODE register is programmed
The LIMIT register is programmed
T
Sleep
T
Sleep
Startup mode
X
X
Table
Startup mode
5-1, bit 1 defines if
“Receiving Mode”
ATA3741
X
X
17