XE1202A Просмотр технического описания (PDF) - Semtech Corporation

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производитель

XE1202A

433 MHz / 868 MHz / 915 MHz Low-Power, Integrated UHF Transceiver

Semtech Corporation 

XE1202A TrueRF™

SC K

SI

START R/W A(4)

A(0)

SO

D(7) D(6) D(5) D(4) D(3) D(2) D(1) D(0)

/EN

Figure 8: Read sequence into configuration register

When the serial interface is not used for read or write operations, both SCK and SI should be set to “1”.

Note that except in read mode, SO is set to “0” and cannot be configured in a high-impedance mode.

5.2 Configuration and Status registers

XE1202A TrueRF™ has a series of configuration registers programmable through the serial control interface

described above. Their details are listed in Table 10 below. The size of these registers is 1, 2, 3, or 4 bytes. Their

byte address is a 5 bit address, A[4:0]. In addition, there is one register, DataOut, from which users can read

various transceiver status information.

Name

RTParam

FSParam

DataOut

ADParam

Pattern

Size

2 x 8 bit

3 x 8 bit

1 x 8 bit

2 x 8 bit

4 x 8 bit

Byte Address

00000

00001

00010

00011

00100

00101

00110

00111

01000

01001

01010

01011

Description

Receiver

and

parameters registers

Frequency parameters

transmitter

Transceiver data register

Additional parameters

Reference pattern for the “pattern

recognition” function

Table 10: Configuration registers

All the bits that are referred to as “reserved” in this section should be set to “0” during write operations.

5.2.1 RTParam configuration register

Name

Bits

RTParam_Rmode 7

Byte Address

00000

RTParam_Bits

6

RTParam_RSSI

5

RTParam_FEI

4

00000

00000

00000

Description

Receiver modes:

0 -> A-mode (high sensitivity)

1 -> B-mode (high linearity)

Bit synchronizer on/off:

0 -> off; 1 -> on

RSSI on/off:

0 -> off; 1 -> on

FEI on/off:

0 -> off; 1 -> on

© Semtech 2006

17

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