1、JEDEC STANDARD Radio Front End - Baseband Digital Parallel (RBDP) Interface JESD207 MARCH 2007 JEDEC SOLID STATE TECHNOLOGY ASSOCIATION NOTICE JEDEC standards and publications contain material that has been prepared, reviewed, and approved through the JEDEC Board of Directors level and subsequently
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9、 reproduce a limited number of copies through entering into a license agreement. For information, contact: JEDEC Solid State Technology Association 2500 Wilson Boulevard Arlington, Virginia 22201-3834 or call (703) 907-7559 JEDEC Standard No.207 -i- RADIO FRONT ENDBASEBAND (RF-BB) INTERFACE Contents
10、 Foreword iii Introduction . iii I.1 Data Path Overview iii I.2 Data Path Features iii I.3 Control Plane Overview.iv I.4 Control Plane Features.iv 1 Scope 1 2 References2 3 Terminology 3 3.1 Terms and definitions .3 3.2 Acronyms and abbreviations.4 3.3 Numeric representation.4 4 Data path Functional
11、 layer 5 4.1 Data path signals.5 4.1.1 MCLK (Driven from RFIC to BBIC) 5 4.1.2 FCLK (Driven from BBIC to RFIC) .5 4.1.3 TXNRX (Driven from BBIC to RFIC)6 4.1.4 ENABLE (Driven from BBIC to RFIC)6 4.1.5 DIQ11:10, DIQ9:0 (Bidirectional) .7 4.2 Data bus idle and turnaround periods .7 4.3 Data path funct
12、ional timing 8 4.3.1 Transmit burst8 4.3.2 Receive burst .9 4.3.3 Data path timing parameters 9 5 Control Plane Functional layer11 5.1 Control Plane signals 11 5.1.1 CPCLK (Driven from BBIC to RFIC).11 5.1.2 CPCSB (Driven from BBIC to RFIC) .11 5.1.3 CPMOSI, CPMISO and CPDIO12 5.2 Control plane func
13、tional timing 13 5.2.1 Single transactions.13 5.2.2 Extended data transactions.14 5.2.2 Extended data transactions (contd).15 5.2.3 Control plane timing parameters15 5.3 Control plane clock frequency bands16 6 Electrical layer 17 6.1 Absolute maximum ratings.17 6.2 Normal operating conditions.17 6.3
14、 DC characteristics .17 6.4 AC characteristics .18 6.5 Timing parameter measurement18 Annex A Data path applications and resulting sample/data/clock rates.19 A.1 Mandatory rates 19 A.2 Optional rates20 Annex B Informative description of TXNRX and ENABLE burst control signalling 21 B.1 Pulse synchron
15、isation fault recovery 22 Annex C Recommended PCB characteristics and component slew rates.23 Annex D Recommended component pin ordering24 Standard Improvement Form JEDEC Standard No. 207 -ii- RADIO FRONT END-BASEBAND DIGITAL PARALLEL (RBDP) INTERFACE Contents FIGURES Figure 1 RBDP interface data pa
16、th signals and layers1 Figure 2 RBDP interface control plane signals and layers .2 Figure 3 Data path transmit burst start8 Figure 4 Data path transmit burst finish .8 Figure 5 Data path receive burst start .9 Figure 6 Data path receive burst finish.9 Figure 7 Data path timing constraints summary .1
17、0 Figure 8 Control plane 4-wire and 3-wire single transactions 13 Figure 9 Extended transactions with 3 data fields 14 Figure 10 Control plane timing constraints summary.15 Figure 11 Timing parameter measurement.18 Figure 12 TXNRX/ENABLE conceptual FSM 21 Figure 13 Recommended BBIC/RFIC pin ordering
18、 .24 TABLES Table 1 Data path timing constraint values.10 Table 2 Control plane extended data transaction performance gains15 Table 3 Control plane timing constraint values 16 Table 4 Absolute maximum ratings17 Table 5 Normal operating conditions .17 Table 6 DC characteristics17 Table 7 AC character
19、istics18 Table 8 Mandatory interface rates : 2T2R or 1T2R, 2x Fs .19 Table 9 Mandatory interface rates : 1T1R, 2x Fs .19 Table 10 Optional interface rates : 2T2R or 1T2R, 2x Fs.20 Table 11 Optional interface rates : 1T1R, 2x Fs.20 Table 12 PCB trace characteristics .23 JEDEC Standard No. 207 -iii- R
20、ADIO FRONT END-BASEBAND DIGITAL PARALLEL (RBDP) INTERFACE Foreword This standard establishes the requirements for a RF-BB Digital Parallel (RBDP) interface between a Radio Front-end integrated circuit (RFIC) and a BaseBand (BBIC) integrated circuit. The interface definition includes both data path t
21、ransfers and control plane transactions. Included are requirements for electrical/physical signalling and logical/functional operation. These requirements are intended to ensure that multiple RFIC and BBIC components can interoperate across a common IC interface. Introduction This interface definiti
22、on is intended for applications where the RFIC and BBIC are mounted on the same PCB, connected by relatively short PCB traces. A typical example would be a wireless networking NIC realised on a PCMCIA ExpressCard or Mini-PCI card format. I.1 Data Path Overview The data path interface is a (relativel
23、y) low-speed parallel-bus digital interface that has been defined primarily for wireless networking applications, transferring baseband I and Q waveform digital data samples in both directions between the BBIC and RFIC. The design envelope for the data path interface includes system configurations w
24、ith both one and two RF/antenna paths in each direction : specifically, this includes 1T1R, 1T2R and 2T2R systems. The data path interface consists of fourteen or sixteen single-ended LVCMOS digital signals, including clocks, control signals and data bus signals. The data bus width is matched to the
25、 baseband sample width being used : 10-bit sample widths are mandatory while 12-bit sample widths are optional. The data bus is bi-directional and alternates between transmit and receive transfer bursts, so the interface definition supports TDD or half-duplex FDD wireless networking system operation
26、. The clock rates and interface transfer speeds support system architectures with up to 2x Nyquist over-sampling (including 802.16 WiMAX “sampling factor” expansion) for 20MHz channel bandwidths for up to 2 RF/antenna paths within the RFIC. Figure 1 illustrates the RBDP data path interface. I.2 Data
27、 Path Features 1. Data path clock and data rate controlled by RFIC (configured by BBIC) up to 90 MHz and 180 MSps 2. Data width matched to baseband sample width 10 or 12 bits 3. Raw data path interface transfer bandwidth up to 1.8 or 2.2 Gbps 4. Double data rate (DDR) source-synchronous data path tr
28、ansfer timing 5. Low latency (single baseband complex sample period) data transfer 6. Low implementation complexity 7. Low power idle modes JEDEC Standard No. 207 -iv- I.3 Control Plane Overview The control plane interface consists of three or four single-ended LVCMOS digital signals, including cloc
29、k, chip-select and 1-bit serial data signals. The data signalling can be implemented either as two separate unidirectional signals or as a single bi-directional signal, but whichever is used, the data transfer is always half-duplex. The interface definition supports non-overlapping memory-mapped reg
30、ister read or write transactions with 8b-wide data fields. An extended transaction format allows multiple data fields to be transferred in a single transaction, reducing overhead and increasing efficiency and throughput. Figure 2 illustrates the control plane board-level connections for the RBDP int
31、erface. I.4 Control Plane Features 1. Clock rate and serial transfer rate controlled by BBIC up to 50 MHz 2. 1-bit command + 7-bit address control field format 3. Flexible transaction format using one or more 8-bit data fields per transaction allows per-transaction optimization of latency or bandwid
32、th a. minimum 325ns transaction latency with 8-bit data transactions (maximum 24 Mbps data rate) b. data rates above 40 Mbps can be achieved with extended transactions (see section 5.2.2) 4. Serial clock can be stopped between transactions, reducing control plane power consumption to negligible leve
33、ls JEDEC Standard No. 207 Page 1 RADIO FRONT ENDBASEBAND DIGITAL PARALLEL (RBDP) INTERFACE (From JEDEC Board Ballot JCB-07-18, formulated under the cognizance of the JC-61 Committee on Wireless Interface Network.) 1 Scope The normative information in this standard is intended to provide a technical
34、design team to implement data path and control plane interface functions for an RFIC component and/or a BBIC component such that these components will operate correctly with each other (at the interface level), when designed to this specification. Additional information is provided in the annexes to
35、 help illustrate the normative material. This document addresses the following interface topics for each of the data path and control plane definitions : 1) Electrical : time and amplitude specifications for individual signal transitions and related groups of signal transitions; 2) Functional : data
36、 path transfer burst format and control plane transaction format This document defines a parallel data path and a serial control plane which together enable the bi-directional transfer of data and control/status information between the RFIC and the BBIC. The interface definition covers electrical si
37、gnalling, digital timing, bit ordering and field formatting requirements to promote basic interoperability between multiple vendors. The interface definition does not extend to the level of automatic discovery of component capabilities which would be required to enable true “plug-n-play” operation.
38、Figure 1 illustrates the data path board-level connections and the layering of functions described by this interface definition (in the gray-shaded boxes) as well as a conceptual view of the internal connections for the interface logic blocks within the RFIC and BBIC. RFIC BBICRBDPdata pathFunctiona
39、lBBCoreRBDPElectricalMCLKDIQ9:0FCLKTXNRXENABLEDIQ11:10*BBprocessing (if any)Converters(DACs/ADCs)Mixed-signalRF functionsRBDPdatapathFunctionalRBDP Electrical* DIQ11:10 are optional, implemented if support for 12-bit baseband sample widths is required.multiple parallelsample streamsmultiple parallel
40、sample streamsFigure 1 RBDP interface data path signals and layers JEDEC Standard No. 207 Page 2 1 Scope (contd) Figure 2 illustrates the control plane board-level connections and the layering of functions described by this interface definition (in the gray-shaded boxes) as well as a conceptual view
41、 of the internal connections for the interface logic blocks within the RFIC and BBIC. RFIC BBICRBDPcontrol planeFunctionalRBDPElectricalCPMISO *CPCLKCPCSBCPMOSI *RBDPcontrol planeFunctionalRBDP Electrical* The serial data transfer may be implemented using a single bidirectionalpin CPDIO instead of t
42、wo unidirectional pins CPMOSI and CPMISO.internalfunctionsinternalcontrol/statusCPDIO *Figure 2 RBDP interface control plane signals and layers 2 References Informative The following standards contain provisions that, through references in the text, are informative in this standard. At the time of p
43、ublication, the editions indicated were valid. All standards are subject to revisions. . Normative JESD76, Description of 1.8 V CMOS Logic Devices, April 2000 JESD8-7A, 1.8 V 0.15 V (Normal Range) and 1.2 V - 1.95 V (Wide Range) Power Supply Voltage and Interface Standard for Nonterminated Digital I
44、ntegrated Circuits, October 2001 JEDEC Standard No. 207 Page 3 3 Terminology For the purpose of this standard, the following terms, definitions, acronyms and abbreviations apply. 3.1 Terms and definitions baseband frequencies: Low frequencies neighbouring and including 0 Hz. These frequencies are re
45、presented with real In-Phase (I) and Quadrature (Q) parts or together as a complex signal. In this document, the word “baseband” will usually refer to a baseband processor (part of the BBIC in this interface). (baseband) complex sample: one related pair of I and Q data words for one radio path, Q fo
46、llowing I consecutively across the data path interface complex sample rate: the minimum FFT sample rate required to support the systems radio channel bandwidth. Defined by the wireless networking PHY standard concerned : e.g., 802.11 (= 2x Channel Bandwidth) or 802.16 (2x Sampling Factor x Channel B
47、andwidth). See Annex A for an illustration of applications of this interface definition and resulting sample rates, data rates and clock frequencies. control plane transaction: a sequence of signal transitions on the control plane interface such that a single complete control plane read or write ope
48、ration is executed deskew: The act of aligning a clock with incoming data so that the clock edge can be used to latch data in the middle of the data eye. data plane transfer burst: a sequence of transitions on the data plane signals which results in one or more baseband sample being communicated in
49、either direction between the RFIC and the BBIC interface baseband sample rate: the rate at which complex samples are transferred across the data path interface. May be either 1x, 2x or 4x the complex sample rate, depending upon system configuration. See Annex A for an illustration of applications of this interface definition and resulting sample rates, data rates and clock frequencies. interface data rate (per pin): the number of bits transferred per DIQ signal per second. Must always be at least 2x, 4x or 8x the comp
