TRF2443IPFPR datasheet(51/72 Pages) TI

51 / 72 page

READBACK MODE

32nd

Write

clock

pulse

1st Read

clock pulse

2nd Read

clock pulse

32nd Read

clock pulse

33rd Read

clock pulse

“End of Write Cycle”

pulse

ReadBack

Data Bit31

Read

Back

Data

Bit1

Read

Back

Data

Bit29

ReadBack

Data Bit30

ReadBack

Data Bit0

CLOCK

READBACK

DATA

su2

LATCH

ENABLE

1st Write

clock

pulse

su1

(CLK)

32nd

Writes

clock

pulse

DB2

Address Bit2

DB1

Address Bit1

CLOCK

DATA

(CL)

(CH)

LATCH

ENABLE

DB3

Address Bit3

su2

su3

DB0 (LSB)

Address Bit0

DB29

DB30

DB31 (MSB)

TRF2443

www.ti.com ................................................................................................................................... SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009

Table 8. TX Power-Detector Response-Time Delay vs

PWRDET_DEL<1,0>

PWRDET_DEL

DET DELAY

µs

PWRDET<2,0>: TX power-detector threshold-level control

The TRF2443 implements the capability to read back the content of the serial programming-interface registers.

Each readback is composed of two phases:

1. Writing a request to read back data

2. Reading the actual data of the internal registers (see timing diagram in Figure 100).

During the writing phase, a command is sent to the TRF2443 to set it in readback mode and to specify which

the RDBKSPI pin and can be read at the following falling edge (LSB first). The first clock after the LE goes high

(end of writing cycle) is idle, and the following 32 clock pulses transfer the internal register content to the

RDBKSPI pin.

Figure 100. SPI Readback Timing Diagram

Submit Documentation Feedback

Product Folder Link(s): TRF2443

TRF2443IPFPR Datasheet(PDF) 51 Page - Texas Instruments

TRF2443IPFPR Datasheet(HTML) 51 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

Datasheet Download

Link URL