MA28140 Datasheet, PDF (2/72 Pages) Dynex Semiconductor – Packet Telecommand Decoder

MA28140
CONTENTS
Page
Front sheet ............................................................................ 1
1. Introduction ....................................................................... 2
2. TC Decoder Subsystem Overview .................................... 3
3. PTD Architectural Overview .............................................. 4
4. PTD Functional Description
4.1 Coding Layer ....................................................... 6
4.2 Transfer Layer ..................................................... 9
4.3 Authentication Layer .......................................... 15
4.4 Segmentation Layer ........................................... 21
4.5 CPDU ................................................................. 22
4.6 Telemetry Reporting .......................................... 24
5. PTD Interfaces
5.1 Physical Channel Interface ................................ 27
5.2 MAP Interface .................................................... 27
5.3 Telemetry Interface ............................................ 30
5.4 Parallel Interface ................................................ 34
5.5 CPDU Interface .................................................. 35
5.6 Local Bus Interface ............................................ 36
5.7 Memories ........................................................... 36
5.8 External Authentication ...................................... 41
6. State After Reset ............................................................. 42
7. Signal Description ........................................................... 44
8. Electrical Characteristics and Ratings
8.1 DC Parameters .................................................. 47
8.2 AC Parameters .................................................. 48
9. Package Details
9.1 Dimensions ........................................................ 65
9.2 Pin Assignment .................................................. 66
10. Radiation Tolerance ...................................................... 70
11. Ordering Information ..................................................... 70
12. Synonyms ..................................................................... 71
1. INTRODUCTION
This document is the data sheet of the “Packet
Telecommand Decoder”, henceforth called the PTD.
The PTD is compatible with the ESA PSS-04-107 standard
directly derived from the CCSDS recommendations. This
standard is described in references 1 and 2. The data sheet is
based on both documents for the description of the protocol.
Nevertheless, it was impossible to include the whole reference
documents in the data sheet, thus some specific points of the
protocol or some descriptions of the recommended hardware
implementation have not been included. The reader may find
these points in the applicable documents.
CONVENTION
In this document the two conventions described in
references 1 and 2 apply:
1. The first bit in the field to be transmitted (i.e. the most left
justified bit when drawing a figure) is defined to be Bit 0. When
the field is used to express a binary value, the Most Significant
Bit (MSB) shall be the first transmitted bit of the field (i.e. Bit 0).
Bit 0
N Bit Data Field
MSB
← First Bit transmitted = MSB
Bit N-1
LSB
Note: Some of the external interfaces have parallel busses
(LADR, LDAT, PBUS, SELTC) which have the opposite bit
order specified, i.e. Bit 0 is The Least Significant Bit.
2. An 8-bit word (a byte) is called an OCTET.
REFERENCES
1. “Packet Telecommand Standard” ESA PSS-04-107,
Issue 2, April 92.
2. “Telecommand Decoder Specification” ESA PSS-04-151,
Issue 1, September 93.
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