Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TMS3705A1DRG4 Datasheet(PDF) 8 Page - Texas Instruments

Part # TMS3705A1DRG4
Description  TRANSPONDER BASE STATION IC
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS3705A1DRG4 Datasheet(HTML) 8 Page - Texas Instruments

Back Button TMS3705A1DRG4 Datasheet HTML 4Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 5Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 6Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 7Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 8Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 9Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 10Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 11Page - Texas Instruments TMS3705A1DRG4 Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 23 page
background image
TMS3705
11-07-22-003 – SCBS881B – JANUARY 2010 – REVISED APRIL 2010
www.ti.com
The default mode is a read-only mode that uses the default frequency as the carrier frequency for the full bridge.
Therefore the mode control register does not need to be written (it is filled with low states), and the
communication sequence between microcontroller and base station starts with TXCT being low for a fixed time to
initiate the charge phase. When TXCT becomes high again, the module enters the read phase and the data
transmission via the SCIO pin to the microcontroller starts.
There is another read-only mode that differs from the default mode only in the writing of the mode control register
before the start of the charge phase. The way that the mode control register is filled and the meaning of its
contents is described below.
The write-read mode starts with the programming of the mode control register. Then the charge phase starts with
TXCT being low for a fixed time. When TXCT becomes high again, the write phase begins in which the data are
transmitted from the microcontroller to the transponder via the TXCT pin, the control logic, the predrivers, and the
full bridge by amplitude modulation of 100% with a fixed delay time. After the write phase TXCT goes low again
to start another charge or program phase. When TXCT becomes high again, the read phase begins.
The contents of the mode control register define the mode and the way that the carrier frequency generated by
the frequency divider is selected in order to meet the transponder resonance frequency as good as possible.
Table 1. Mode Control Register (7-Bit Register)
BIT
RESET
DESCRIPTION
VALUE
NAME
NO.
START_BIT
Bit 0
0
START_BIT = 0
The start bit is always low and does not need to be stored.
DATA_BIT[4:1] = 0000
Microcontroller selects division factor 119
DATA_BIT1
Bit 1
0
DATA_BIT[4:1] = 1111
Division factor is adapted automatically(1)
DATA_BIT[4:1] = 0001
Microcontroller selects division factor 114
DATA_BIT2
Bit 2
0
DATA_BIT[4:1] = 0010
Microcontroller selects division factor 115
...
...
DATA_BIT3
Bit 3
0
DATA_BIT[4:1] = 0110
Microcontroller selects division factor 119
...
...
DATA_BIT4
Bit 4
0
DATA_BIT[4:1] = 1011
Microcontroller selects division factor 124
SCI_SYNC = 0
Asynchronous data transmission to the microcontroller
SCI_SYNC
Bit 5
0
SCI_SYNC = 1
Synchronous data transmission to the microcontroller
RX_AFC = 0
Demodulator threshold is adapted automatically
RX_AFC
Bit 6
0
RX_AFC = 1
Demodulator threshold is defined by DATA_BIT[4:1]
TEST_BIT = 0
No further test bytes
TEST_BIT
Bit 7
0
TEST_BIT = 1
Further test byte follows for special test modes
(1)
Only available for TMS3705A1DRG4
The TMS3705A1DRG4 can adjust the carrier frequency to the transponder resonance frequency automatically by
giving the counter state of the transponder resonance-frequency measurement directly to the frequency divider
by setting the first four bits in high state. This setting is not available for TMS3705BDRG4. The other
combinations of the first four bits allow the microcontroller to select the default carrier frequency or to use
another frequency. The division factor can be selected to be between 114 and 124.
Some bits for testability reasons can be added. The default value of these test bits for normal operation is low.
Especially the bit 7 called TEST_BIT is Low for normal operation; otherwise the base station may enter one of
the test modes.
The control logic also controls the demodulator, the SCI encoder, the diagnosis, and especially the transmission
of the diagnosis byte during the charge phase.
The state diagram in Figure 1 shows the general behavior of the state machine (note that the state blocks drawn
can contain more than one state). All given times are measured from the moment when the state is entered if not
specified otherwise.
8
Submit Documentation Feedback
Copyright © 2010, Texas Instruments Incorporated


Similar Part No. - TMS3705A1DRG4

ManufacturerPart #DatasheetDescription
logo
Pericom Semiconductor C...
TMS3705A1DRG4 PERICOM-TMS3705A1DRG4 Datasheet
88Kb / 4P
   LF BASE STATION IC
logo
Texas Instruments
TMS3705A1DRG4 TI1-TMS3705A1DRG4 Datasheet
960Kb / 30P
[Old version datasheet]   Transponder Base Station IC
More results

Similar Description - TMS3705A1DRG4

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
TMS3705 TI1-TMS3705_18 Datasheet
960Kb / 28P
[Old version datasheet]   Transponder Base Station IC
TMS3705 TI1-TMS3705_16 Datasheet
960Kb / 30P
[Old version datasheet]   Transponder Base Station IC
TMS3705 TI-TMS3705_V01 Datasheet
855Kb / 26P
[Old version datasheet]   TMS3705 Transponder Base Station IC
REVISED JUNE 2023
RI-TMS3705ADR TI-RI-TMS3705ADR_06 Datasheet
72Kb / 3P
[Old version datasheet]   LF BASE STATION IC
TMS3705ADR TI-TMS3705ADR Datasheet
149Kb / 1P
[Old version datasheet]   LF Base Station IC
logo
Pericom Semiconductor C...
RI-TMS3705ADR PERICOM-RI-TMS3705ADR_08 Datasheet
88Kb / 4P
   LF BASE STATION IC
logo
TEMIC Semiconductors
U2270B TEMIC-U2270B Datasheet
146Kb / 13P
   Read / Write Base Station IC
logo
Texas Instruments
RI-TMS3705ADR TI-RI-TMS3705ADR Datasheet
149Kb / 1P
[Old version datasheet]   LF Base Station IC TMS3705ADR
logo
NIHON DEMPA KOGYO
NV13M09WS NDK-NV13M09WS Datasheet
683Kb / 1P
   Personal Radio Base Station and 5G Base Station
logo
Oscilent Corporation
820-IF63.0M-A OSCILENT-820-IF63.0M-A Datasheet
132Kb / 1P
   Base Station & Repeater
More results


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


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com