1. Lesser Known Capabilities of IEEE 1451
Lesser Known Capabilities of IEEE TEDS and TMS Software Support For Each
April 2002

2. Core Functionality of IEEE 1451.4
Presentation Roadmap
Core Functionality of IEEE
Mixed-Mode Interface
Self Identification
Self Configuration
Scalability
Flexibility
TMS Venona

3. Core Functionality of Dot 4
Define a Dot 4 Object
Mixed Mode Interface From Host To Sensor
Analog/Digital
Digital Mode Accesses TEDS
Transducer Electronic Data Sheet
Self Identification
Self Configuration

4. Core Functionality of Dot 4
Mixed Mode Interface To Sensors
ICP®, IEPE
Inverted Excitation
Multi-Wire Sensors
Use Existing Wires, or…
Add Another
The physical layer of Dot 4 specifies two different ways of implementing TEDS in legacy designs. Consider the two cases:
CASE 1: No Additional Wires
Mode Physical Wire
A B
Normal Power Ground
Digital Mode Data Ground
CASE 2: Additional Wires
A B C
Normal Power Ground <Not Existing>
Digital Mode None Data Ground
Of course, ICP® sensors fall into Case 1. Case 2 exists primarily to accommodate legacy B&K microphone equipment that is currently in the field. It also accomodates sensors that may have AC power excitation.

5. Core Functionality of Dot 4
Self Identification
Determine What Type of Sensor It Is
Excitation / Signal Conditioning Required
Manufacturer ID, Serialization, Calibration
Available Dot 4 Configurations
TEDS (Transducer Electronic Data Sheet)

6. Core Functionality of Dot 4
Self Configuration
Expose Multiple Configurations To Dot 4 Host
Active or Passive Config (Multi-Drop Sensors)
Multi-gain Config (Self-Attenuating Force Sensors)
Filtering (Internally A, C Weighted Microphones)

7. Core Functionality of Dot 4
Self Configuration
Expose Configurations To Dot 4 Host
Active or Passive Config (Multi-Drop Sensors)
Dot 4 Host
Dot 4 XDCR
Dot 4 XDCR
Passive
Passive
Active
Active
Tranduction
Tranduction
Host MMI
XDCR MMI
XDCR MMI

8. Core Functionality of Dot 4
Self Configuration
Expose Configurations To Dot 4 Host
Selective Signal Conditioning In Sensor
Dot 4 Host
Dot 4 XDCR
Tranduction
Host MMI
XDCR MMI

9. Presentation Roadmap
Core Functionality of IEEE
Scalability
Flexibility
TMS Venona

10. Current 256+64 Bit Memory (DS2430) 4 kBit Memory (DS2433)
Scalability
Current Bit Memory (DS2430)
4 kBit Memory (DS2433)
Multi-Chip Transducers
Dot 4 Host
Dot 4 XDCR
MEMORY
Tranduction
Host MMI
XDCR MMI

11. Presentation Roadmap
Core Functionality of IEEE
Scalability
Flexibility
TMS Venona

12. Divide Self-Identifying TEDS into 2 parts:
Dot 4 Flexibility
Divide Self-Identifying TEDS into 2 parts:
Basic TEDS
Contains common info for all transducers: Mfr., Model, Serial
Extended TEDS
Contains decoding information, calibration information, others...

13. < Field >,< Data >
Dot 4 Flexibility
Dot 4 Host Relies Upon External Templates To Decode The TEDS
1451.4
Templates
Manufacturer
Templates
User
Templates
Decoded TEDS
< Field >,< Data >
T-BLOCK
Software
Binary TEDS
< >

14. Manufacturer Templates User Templates
Dot 4 Flexibility
IEEE Templates
Currently 22 templates (accels, microphones, charge amps)
Manufacturer Templates
Brings in other sensor types
User Templates
High end users, specific applications

15. All Groups Are Dot 4 Compliant
Dot 4 Flexibility
How Standard Is Your TEDS Template?
All Groups Are Dot 4 Compliant
1451.4
Templates
Manufacturer
Templates
User
Templates
Std. PCB Accels
Std. Endevco Accels
TMS Microphones
B&K Microphones
Force Sensors
PCB Hammers
others...
TBD…
More Recognized
Less Recognized

16. Presentation Roadmap
Core Functionality of IEEE
Scalability
Flexibility
TMS Venona

17. Venona - A Cross-Platform TEDS Engine
Independent of Host Hardware
Applicable To All PCB Group Products
1451.4
Templates
Manufacturer
Templates
User
Templates
LMS
Templates
Decoded TEDS
< Field >,< Data >
TMS
Venona
Binary TEDS
< >

18. Venona - Layer Separation
Remove Hardware Dependency
Venona
Direct Connection
PDA For Display
Serial Port
Personal Computer
Signal Conditioner