AC4486-5M Laird Technologies, AC4486-5M Datasheet - Page 44

• Manufacturer Part Number: AC4486-5M
• Description: TXRX 868MHZ 3V TTL 5MW RS232
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4486-5M

• Frequency: 868MHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: FSK
• Applications: AMR, Gaming Devices, Inventory Tracking
• Power - Output: 5mW
• Sensitivity: -100dBm
• Voltage - Supply: 3.3V
• Current - Receiving: 30mA
• Current - Transmitting: 40mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Board Size: 49 mm x 42 mm x 5 mm
• Output Power: 5 mW
• Antenna: External MMCX Connector
• Frequency Rf: 869.65MHz
• Transmit Power: 5mW
• Interface Type: Serial
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AC4486 Specifications
5.2.6 Serial Interface Baud Rate
This two-byte value determines the baud rate used for communicating over the serial interface to a
transceiver. Table 8 - Baud Rate/Timeout lists values for some common baud rates. Baud rates below
1200 baud are not supported. For a baud rate to be valid, the calculated baud rate must be within ±3%
of the OEM Host baud rate. If the 9600_BAUD pin (Pin 12) is pulled logic Low at reset, the baud rate
will be forced to 9,600. For Baud Rate values other than those shown in Table 5 - Baud Rate, the
following equation can be used:
5.2.7 Network Topology
RF Channel Number – RF Channel Number selects the operational frequency band of the transceiver.
The AC4486 provides two channels of operation based on output power and transmit duty cycle. The
AC4486 does not restrict the duty cycle or power output and the OEM is responsible for ensuring that
these requirements are met. This information is provided in the chart below:
4
5
01/21/05
57,600 is the default baud rate.
00h will yield a stop bit of 421uS. The stop bit at 1200 baud should be 833us.
Baud Rate
115,200
57,600
38,400
28,800
19,200
14,400
9,600
4800
2400
1200
4
BaudL (42h)
BAUD = 100h - (14.7456E
FCh
FEh
FAh
E8h
D0h
A0h
F8h
F4h
F0h
40h
Table 9 – Baud Rate/Interface Timeout
BaudL = Low 8 bits of BAUD (base16)
BaudH (43h)
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
BaudH= Always 0
+06
/ (64 * desired baud rate))
Minimum Interface
Timeout (58h)
02h
02h
02h
02h
03h
04h
05h
09h
11h
21h
Stop Bit Delay (3Fh)
00h
FCh
FFh
0Eh
7Ah
03h
08h
19h
23h
39h
5
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