User's Manual
AC4424 Specifications
AC4424 SpecificationsAC4424 Specifications
AC4424 Specifications
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frequency bins. Though the RF hardware is still technically half duplex, it makes the radio
seem full duplex. This can cause overall throughputs to be cut in half. Note: All transceivers
Note: All transceivers Note: All transceivers
Note: All transceivers
on the same network must have the same setting for Full Duplex.
on the same network must have the same setting for Full Duplex. on the same network must have the same setting for Full Duplex.
on the same network must have the same setting for Full Duplex.
5.2.6
5.2.65.2.6
5.2.65.2.5
5.2.55.2.5
5.2.5
Interface Timeout/RF Packet Size
Interface Timeout/RF Packet SizeInterface Timeout/RF Packet Size
Interface Timeout/RF Packet Size
Interface timeout, in conjunction with RF Packet Size
RF Packet SizeRF Packet Size
RF Packet Size, determines when a buffer of data will
be sent out over the RF as a complete RF packet based on whichever condition occurs first.
Interface Timeout
Interface TimeoutInterface Timeout
Interface Timeout – Interface Timeout specifies a maximum byte gap in between consecutive
bytes. When that byte gap is exceeded, the bytes in the transmit buffer are sent out over
the RF as a complete packet. Interface timeout is adjustable in 160uS decrements. The
actual timeout created by Interface Timeout is equal to the 2's complement of Interface
Timeout times 160uS. The default value for Interface Timeout is F0H or 2.56ms.
RF Packet Size
RF Packet Size RF Packet Size
RF Packet Size – When the amount of bytes in the transceiver transmit buffer equals RF
Packet Size, those bytes are sent out as a complete RF packet.
5.2.7
5.2.75.2.7
5.2.75.2.6
5.2.65.2.6
5.2.6
Serial Interface Baud Rate
Serial Interface Baud RateSerial Interface Baud Rate
Serial Interface Baud Rate
This two-byte value determines the baud rate used for communicating over the serial
interface to a transceiver. Table 9
Table 9 Table 9
Table 9 -
--
- Baud Rate
Baud Rate Baud Rate
Baud Rate lists values for some common baud rates.
Baud rates below 110 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
If the 9600_BAUD pin (Pin 12) is If the 9600_BAUD pin (Pin 12) is
If the 9600_BAUD pin (Pin 12) is
pulled logic Low at reset, the baud rate will be forced to 9,600
pulled logic Low at reset, the baud rate will be forced to 9,600pulled logic Low at reset, the baud rate will be forced to 9,600
pulled logic Low at reset, the baud rate will be forced to 9,600.
. .
. For Baud Rate values other
than those shown in Table 9
Table 9 Table 9
Table 9 -
--
- Baud Rate
Baud Rate Baud Rate
Baud Rate, the following equation can be used:
BAUD = (18.432E+06/(32*d
BAUD = (18.432E+06/(32*dBAUD = (18.432E+06/(32*d
BAUD = (18.432E+06/(32*desired baud rate))
esired baud rate))esired baud rate))
esired baud rate))
BaudH= High 8 bits of BAUD (base16)
BaudH= High 8 bits of BAUD (base16)BaudH= High 8 bits of BAUD (base16)
BaudH= High 8 bits of BAUD (base16)
BaudL = Low 8 bits of BAUD (base16)
BaudL = Low 8 bits of BAUD (base16)BaudL = Low 8 bits of BAUD (base16)
BaudL = Low 8 bits of BAUD (base16)
Table
Table Table
Table 8
88
8
–
––
– Baud Rate
Baud Rate Baud Rate
Baud Rate
Baud
Baud Baud
Baud
Rate
RateRate
Rate
BaudL
BaudL BaudL
BaudL
(42h)
(42h)(42h)
(42h)
BaudH
BaudH BaudH
BaudH
(43h)
(43h)(43h)
(43h)
Minimum Interface
Minimum Interface Minimum Interface
Minimum Interface
Timeout (58h)
Timeout (58h)Timeout (58h)
Timeout (58h)
288,00
0
02h 00h FFh
192,00
0
03h 00h FFh
115,20
0
05h 00h FEh
57,600 0Ah 00h FDh
38,400 0Fh 00h FCh
28,800 14h 00h FBh
19,200 1Eh 00h F9h