ARF7429A ADEUNIS, ARF7429A Datasheet - Page 11

• Manufacturer Part Number: ARF7429A
• Description: MODULE, ARF54, EURO
• Manufacturer: ADEUNIS
• Type: Modem Moduler

Specifications of ARF7429A

• Modulation Type: FM
• Data Rate Max: 57.6Kbps
• Frequency Range: 869.4MHz To 869.65MHz
• Sensitivity: -110dBm
• Supply Voltage Range: 3V To 3.6V
• Supply Current: 700mA
• Rohs Compliant: Yes

S219
Tde
min
By default, the DE and RE lines are asserted LOW, allowing the reception of
characters from the RS485 differential bus. The DE and RE lines are asserted
HIGH only when one or several characters have to be transmitted over the
RS485 differential bus: when a radio frame is demodulated, the lines are
asserted HIGH and then the data extracted from the radio frame are sent to
the module TXD line and therefore to the RS485 differential bus. When the
last character has been transmitted over the RS485 differential bus, the lines
are asserted LOW.
Ref. 08-07-V6-lmn
DE/RE
DE/RE
Figure 3: DE/RE timing when a reply is sent back on the TXD line
TXD
RXD
RXD
TXD
Figure 2: DE/RE timing when data are sent over the serial link
•
•
•
15
µs
0
Thold : minimum = 1 µs
Tde : set according to the S219 register value (see table
hereafter)
In command mode, when a reply is sent back (on the TXD line)
according to the following DE/RE timing :
35
µs
1
CMD
CMD
≥ 100µs
65
µs
2
Tde
≥ 700 µS
135
µs
3
150
µs
4
n DATA bytes
190
µs
5
REPLY
330
10
µs
600
20
µs
Thold
≥ 100µs
1.1
ms
A
40
RF54
User Guide
1.7
ms
60
p. 9
2.3
ms
80
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