Linx-technologies TRM-915-DTS Manual de usuario descargar pdf (Pagina 5)

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Figure 4: Electrical Speciﬁcations

DTS Series Transceiver Speciﬁcations

Parameter Symbol Min. Typ. Max. Units Notes

Adjacent Channel Rejection –48 dBc 6

IF Bandwidth

DTS Mode 600 kHz

LP Mode 200 kHz

Transmitter Section

Output Power P

O

dBm

Low Power –4 –1 dBm 5

Mid-Low Power 1 4 dBm 5

Mid-High Power 11 14 dBm 5

Harmonic Emissions P

H

–50 dBc 5

Frequency Deviation

DTS Mode ±235 kHz

LP Mode ±75 kHz

Interface Section

Input

Logic Low V

I L

0 0.3*Vcc VDC

Logic High V

I H

0.7*Vcc 5.0 VDC

Output

Logic Low V

OL

0 0.4 VDC

Logic High V

OH

2.5 Vcc VDC

Flash Speciﬁcations (Non-Volatile Registers)

Flash Write Duration 16 21 ms

Flash Write Cycles 20k 100k cycles

1. Vcc = 3.3VDC

2. Varies with data rate

3. Continuous operation, varies with

UART data rate

4. F

LO

+1MHz and F

LO

+1.945MHz

5. Into a 50-ohm load

6. Fc ± 650kHz

7. Encoding/overhead losses included,

144 byte MTU

Pin Assignments

3

21

GND

NC

4

5

6

8

7

9

10

11

12

13

14 15

16

17

18

19

GND

GND

GND

GND

VCC

NC

CMD

RXD

TXD

CTS

NC

NC

C2D

RESET

GND

ANT

GND

Figure 5: DTS Series Transceiver Pin Assignments (Top View)

Pin Descriptions

Pin Number Name I/O Description

1, 12, 14, 15,

16, 17, 18

GND — Ground

2, 3, 8, 9

NC —

No Electrical Connection. Do not connect

any traces to these lines.

4 CMD I

Command Input. This line sets the serial

data as either command data to conﬁgure

the module or packet data to be sent over

the air. Pull low for command data; pull high

for packet data.

5 RXD I

UART Receive Data Input. This is the input

line for the conﬁguration commands as well

as data to be sent over the air.

6 TXD O

UART Transmit Data Output. This is the

output line for the conﬁguration command

responses as well as the data received over

the air.

7 CTS O

UART Clear To Send, active low. This line

indicates to the host microcontroller when

the module is ready to accept data. When

CTS is high, the module is busy. When CTS

is low, the module is ready for data.

10 C2D — Reserved

11 RESET — Reserved

13 ANT — 50-ohm RF Antenna Port

19 VCC — Supply Voltage

Figure 6: DTS Series Transceiver Pin Descriptions

Pin Descriptions

1 2 3 4 5 6 7 8 9 10 ... 24 25

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