ATAB5749-3 Atmel, ATAB5749-3 Datasheet - Page 12

• Manufacturer Part Number: ATAB5749-3
• Description: BOARD XMITTER FOR 315MHZ ATA5749
• Manufacturer: Atmel
• Type: Transmitterr

Specifications of ATAB5749-3

• Frequency: 315MHz
• For Use With/related Products: ATAB5749
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12
ATAB5749
Control Register Table (CR-Table):
This table illustrates the internal register configuration of the ATA5749. The configuration
bytes can be modified directly in the CR-Table by clicking in the field of the binary value.
Figure 2-7.
Control Register Value (CR-Value)
This window interprets the register configuration setting of CR-Table. If the setting in the
CR-Table is changed, the CR-Value window shows the change automatically and vice versa.
The following parameters of the ATA5749 can be set:
• Band Selection: either 300 MHz to 368 MHz or 367 MHz to 450 MHz.
• RF Frequency: The transmit frequency of the board can be determined by selecting the
• Modulation: sets the modulation of the board either to ASK Mode or FSK Mode
• FSK Shift: the frequency deviation of the FSK modulation can be set with this menu by
• Output Power: this menus sets the transmit power of the IC for 50 matching. The value
• Clock Only Mode: in this menu “Clock Only Mode” or “Normal Mode” can be chosen. With
value of the FREQ register. The green check mark in the drop down menu shows the
FREQ values allowed; the red cross shows the values not allowed.
determining the value of the FSEP register.
can be programmed from –0.5 dBm to 12.5 dBm in 1 dB step. The green check mark in the
drop down menu shows the default setting of the demo board, the 12.5 dBm transmit power
output at 50 matching. The matching of the loop antenna is optimized for the 12.5 dBm
transmit power. The power setting can be programmed as described in the datasheet with
the constraint that the default matching of the loop antenna would not be the optimum
matching for other power setting. The power setting with the suboptimal matching due to
the default matching is marked with the yellow check mark. The red cross in the drop down
menu shows the values that are not allowed.
Clock Only Mode, the ATA5749 generates a clock signal based on the crystal frequency for
the microcontroller and no transmission will be performed.
Control Register Table
(Figure 2-8 on page
13):
9138A–AUTO–12/08