1、 Reference number ISO/IEC 26908:2009(E) ISO/IEC 2009INTERNATIONAL STANDARD ISO/IEC 26908 Second edition 2009-11-15 Information technology Telecommunications and information exchange between systems MAC-PHY interface for ISO/IEC 26907 Technologies de linformation Tlinformatique Interface MAC-PHY pour
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5、iat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writ
6、ing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2009 All rights reservedISO/IE
7、C 26908:2009(E) ISO/IEC 2009 All rights reserved iiiContents Page Foreword . v Introduction vi 1 Scope 1 2 Conformance . 1 3 Normative references 1 4 Terms and definitions . 1 5 Notational conventions 1 6 Abbreviations and acronyms 2 7 Overview . 2 8 Interface Signal Description . 3 8.1 Interface Si
8、gnal Definitions 4 8.1.1 Control Interface 4 8.1.2 Data Interface . 5 8.1.3 CCA Interface . 5 8.1.4 Management Interface . 5 8.2 PHY Operational State 6 9 Registers 6 9.1 Bit Ordering and Interpretation 6 9.2 Register Address Spaces . 6 9.3 Static Parameter Definitions 7 9.4 Static Parameter Coding
9、. 11 9.5 Dynamic Register Definitions 14 9.6 Register Map 16 9.7 Register Set Access Timing . 17 9.7.1 Transmit Control Registers 17 9.7.2 Receive Control Registers 18 9.8 TONE-NULLING MAP CONTROL . 18 10 Frame Structures . 19 11 Interface Theory of Operation 24 11.1 Overview . 24 11.1.1 PHY Reset P
10、rotocol . 25 11.1.2 Exit from Sleep State . 25 11.1.3 Normal Operation 26 11.2 Frame Timing . 26 11.3 Ranging Support . 27 11.4 Transceiver Delay Definitions 27 11.5 Transceiver Turnaround Times 29 11.5.1 RX-TX Turnaround Time . 29 11.5.2 TX-RX Turnaround Time . 29 11.6 PREAMBLE CONTROL 29 11.6.1 Si
11、ngle Frame Transmission and Reception 29 11.6.2 Burst Mode Transmission 30 11.6.3 Burst Mode Reception 31 11.7 Transmit Operation . 31 11.7.1 Data Bus Ownership . 31 11.7.2 Single Frame Transmission Control 31 ISO/IEC 26908:2009(E) iv ISO/IEC 2009 All rights reserved11.7.3 Burst Mode Transmission Co
12、ntrol .33 11.7.4 Burst Mode Transmit Error Recovery 34 11.8 Receive Operation .34 11.8.1 Data Bus Ownership 34 11.8.2 Single Frame Reception Control 34 11.8.3 Burst Mode Reception Control .37 11.8.4 Burst Mode Reception Error Recovery .37 11.8.5 Zero Length Frame Reception 38 11.9 MAC Transmit Abort
13、 38 11.10 MAC Receive Abort39 11.11 Error Conditions 39 11.11.1 Transmit Error Conditions 39 11.11.2 Receive Error Conditions 40 11.12 Clear Channel Assessment 41 11.12.1 CCA Interface Signals .42 11.12.2 Operation of the CCA Interface 42 11.13 Management Interface .43 11.13.1 Management Interface S
14、ignals .43 11.13.2 Operation of the Management Interface 43 11.13.3 Examples 45 Annex A (informative) Electrical Specifications .47 A.1 I/O DC Requirements .47 A.1.1 3,3V DC Specification 47 A.1.2 1,8V DC Specification 47 A.1.3 1,2V DC Specification 47 A.2 MAC and PHY Timing Specifications.48 A.2.1
15、PHY Signal Timing .48 A.2.2 MAC Signal Timing 49 Annex B (informative) PHY Vendor and Version Coding 50 B.1 PHYID Format and Coding 50 B.2 PHY Version Format and Coding .50 ISO/IEC 26908:2009(E) ISO/IEC 2009 All rights reserved vForeword ISO (the International Organization for Standardization) and I
16、EC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with
17、particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have
18、established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint t
19、echnical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IS
20、O and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 26908 was prepared by Ecma International (as ECMA-369) and was adopted, under a special “fast- track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its app
21、roval by national bodies of ISO and IEC. This second edition cancels and replaces the first edition (ISO/IEC 26908:2007), which has been technically revised. ISO/IEC 26908:2009(E) vi ISO/IEC 2009 All rights reservedIntroduction ISO/IEC 26907 specifies the PHY and MAC for a high rate ultra wideband w
22、ireless transceiver. Implementations of ISO/IEC 26907 may expose the interface between the PHY and MAC as specified herein. INTERNATIONAL STANDARD ISO/IEC 26908:2009(E) ISO/IEC 2009 All rights reserved 11 Scope This International Standard specifies the interface between implementations of the PHY an
23、d MAC as specified in ISO/IEC 26907. 2 Conformance PHY and MAC implementations of ISO/IEC 26907 conform to this International Standard by implementing the interface specified herein. 3 Normative references The following referenced documents are indispensable for the application of this document. For
24、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 26907:2009, Information technology Telecommunications and information exchange between systems High-rate ultra-wideband PHY and MAC sta
25、ndard (also published by Ecma as Standard ECMA-368) 4 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 26907 apply. 5 Notational conventions The use of the word shall is meant to indicate a requirement which is mandated by the Standard, i.e. it is r
26、equired to implement that particular feature with no deviation in order to conform to the Standard. The use of the word should is meant to recommend one particular course of action over several other possibilities, however without mentioning or excluding these others. The use of the word may is mean
27、t to indicate that a particular course of action is permitted. The use of the word can is synonymous with is able to it is meant to indicate a capability or a possibility. All floating-point values have been rounded to 4 decimal places. An exclamation mark preceding a signal indicates that the signa
28、l is active low. Information technology Telecommunications and information exchange between systems MAC-PHY interface for ISO/IEC 26907 ISO/IEC 26908:2009(E) 2 ISO/IEC 2009 All rights reserved6 Abbreviations and acronyms BM Burst Mode CCA Clear Channel Assessment CRC Cyclic Redundancy Code FCS Frame
29、 Check Sequence FFI Fixed-Frequency Interleaving HCS Header Check Sequence LQI Link Quality Indicator lsb Least-Significant Bit MAC Medium Access Control MIFS Minimum Interframe Space msb Most-Significant Bit PHY Physical (layer) PLCP Physical Layer Convergence Protocol PT Preamble Type RSSI Receive
30、d Signal Strength Indicator RX Receive or Receiver SIFS Short Interframe Space TF Time-Frequency TFC Time-Frequency Code TFI Time-Frequency Interleaving TX Transmit or Transmitter 7 Overview Clause 8 defines the interface signals, their directions and functions. Clause 9 defines the interface parame
31、ters and registers. A recommended mapping for PHY parameters is provided along with the register map for PHY registers and setup and hold timing for register access. Clause 10 defines the frame formats for data exchanges over the interface. Clause 11 is the Theory of Operation for the complete inter
32、face covering the PHY states and transitions, reset and sleep protocols, frame timing references, preamble control and transmit and receive operations for both single frame and burst mode operation as well as receive error cases. The section is completed by definition of the CCA and Management inter
33、face protocols. ISO/IEC 26908:2009(E) ISO/IEC 2009 All rights reserved 3There are two annexes to this specification. Annex A provides an Electrical Interface and Annex B defines formats for two managed identifiers. 8 Interface Signal Description The MAC-PHY signal interface is depicted in Figure 1.
34、It consists of the Data Interface including an 8-bit data bus, the Control Interface, the CCA Interface and the Management Interface. The Data Interface, which is used to transfer data to and from the MAC, operates differently depending on the state of the PHY. The Control Interface is used by the M
35、AC to control the operating state of the PHY and by the PHY to indicate TX/RX status to the MAC. The CCA Interface is used for Clear Channel Assessment status indication. The Management Interface is used to access the PHY registers. PHY MAC CCA_STATUS CCA InterfaceSERIAL_DATA Management Interface PC
36、LK DATA_EN DATA7:0 Data Interface TX_EN RX_EN PHY_ACTIVE PHY_RESET STOPC Control InterfaceFigure 1 PHY-MAC interface signals Table 1, Table 2, Table 3 and Table 4 define the signals in the Control Interface, Data Interface, CCA Interface and Management Interface, respectively. The operational mode o
37、f the Data Interface in each PHY state is summarized in Table 5. ISO/IEC 26908:2009(E) 4 ISO/IEC 2009 All rights reserved8.1 Interface Signal Definitions 8.1.1 Control Interface Table 1 Control Interface Signals SIGNAL Width (Bits) DIR DESCRIPTION !PHY_RESET 1 MAC to PHY !PHY_RESET is asserted for P
38、HY specific interval PHYResetTime to clear all PHY variables and reset the PHY to its initial state. The PHY writes STANDBY to PMMODE and transitions to STANDBY state after !PHY_RESET is de-asserted and reset operations have completed. !PHY_RESET is asynchronous to PCLK. !PHY_RESET is ACTIVE LOW. TX
39、_EN 1 MAC to PHY TX_EN is used to place the PHY in TRANSMIT State. Its secondary use (with RX_EN) is to transition from SLEEP to STANDBY when the PHY clock source has been stopped for power saving. TX_EN is synchronous to PCLK except in SLEEP state. TX_EN is ACTIVE HIGH. RX_EN 1 MAC to PHY RX_EN is
40、used to place the PHY in RECEIVE State. Its secondary use (with TX_EN) is to transition from SLEEP to STANDBY when the PHY clock source has been stopped for power saving. RX_EN is synchronous to PCLK except in SLEEP state. RX_EN is ACTIVE HIGH. PHY_ACTIVE 1 PHY to MAC PHY_ACTIVE is used by the PHY t
41、o indicate that it is either transmitting or receiving a frame over the air. In TRANSMIT state, the rising edge of PHY_ACTIVE indicates the start of frame at the local antenna and the falling edge indicates that the entire frame has been transmitted over the air. In RECEIVE state, the rising edge of
42、 this signal indicates that the start of the preamble has been detected (SyncDelay + the preceding synchronization fields earlier) and the falling edge indicates that the entire frame has been received (PHYActiveDelay earlier) at the local antenna. PHY_ACTIVE is also used in the special cases of Exi
43、t from SLEEP and RESET. PHY_ACTIVE is synchronous to PCLK. PHY_ACTIVE is ACTIVE HIGH. STOPC (optional) 1 MAC to PHY On/Off signal for PCLK in STANDBY state. PCLK is active when STOPC is de-asserted and not active when STOPC is asserted. STOPC is asynchronous to PCLK. STOPC is ACTIVE HIGH. ISO/IEC 26
44、908:2009(E) ISO/IEC 2009 All rights reserved 58.1.2 Data Interface Table 2 Data Interface Signals SIGNAL Width (Bits) DIR DESCRIPTION PCLK 1 PHY to MAC Interface clock provided by the PHY. Interface signals are synchronous to the rising edge of PCLK (see Annex A). The nominal rate of PCLK is 66MHz.
45、DATA_EN 1 PHY to MAC In TRANSMIT state, this signal is used by the PHY to request more data from the MAC. In RECEIVE state, it is used to indicate to the MAC that there is valid data on the DATA7:0 bus. DATA_EN is synchronous to PCLK. DATA_EN is ACTIVE HIGH. DATA7:0 8 Bi-directional DATA7:0 is an 8-
46、bit wide data bus driven by the MAC in TRANSMIT state and by the PHY in all other states including SLEEP. DATA7:0 is synchronous to PCLK whether driven by the PHY or the MAC. DATA7:0 ONE is HIGH. 8.1.3 CCA Interface Table 3 CCA Interface Signals SIGNAL Width (Bits) DIR DESCRIPTION CCA_STATUS 1 PHY t
47、o MAC The PHY returns CCA_STATUS after a CCA request is initiated by the MAC writing to the CCRE register via SERIAL_DATA. CCA_STATUS is synchronous to PCLK. CCA_STATUS is ACTIVE HIGH. 8.1.4 Management Interface Table 4 Management Interface Signals SIGNAL Width (Bits) DIR DESCRIPTION SERIAL_DATA 1 B
48、i-directional The MAC writes control and address bits to SERIAL_DATA to initiate register access. SERIAL_DATA is driven by the MAC for Write operations. It is driven by the MAC for control and address parts of Read operations and by the PHY for the data part of Read operations. SERIAL_DATA is synchr
49、onous to PCLK. SERIAL_DATA ONE is HIGH. ISO/IEC 26908:2009(E) 6 ISO/IEC 2009 All rights reserved8.2 PHY Operational State Table 5 PHY Readiness State STATE DESCRIPTION RESET Transitional state in which the configuration parameters are reset to default values. RESET is asynchronous to PCLK (see 11.1.1). SLEEP The radio is off. PCLK is off (see 11.1.2). STANDBY The radio is off. PCLK is on (unless STOPC is asserted). STANDBY is a higher activity state than SLEE. READY Parts of the radio are on.
