 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
HSP50215VC Datasheet(PDF) 5 Page - Intersil Corporation |
|
||||||||||||||||||||||||||||||
HSP50215VC Datasheet(HTML) 5 Page - Intersil Corporation |
|
|
5 / 21 page  3-426 Functional Description The HSP50215 Digital UpConverter (DUC) converts digital baseband data into modulated or frequency translated digital samples. The DUC can be configured to create any quadrature amplitude shift-keyed (QASK) data modulated signal, including QPSK, BPSK, and m-ary QAM. The DUC can also be configured to create both shaped and unfiltered FM signals. A minimum of 16 bits of resolution is maintained throughout the internal processing. The DUC is configured via the 16-bit microprocessor data bus, using the address bus and RD, WR and CE control signals. Configuration data that is loaded via this bus includes the 30-bit Sample Rate NCO center frequency, the 32-bit Carrier NCO center frequency, the modulation format, gain control, FIFO control, reset control and sync control. The I and Q baseband channels each have a 256 tap FIR filter whose coefficients and configuration are also programmed via the µP interface. Similarly, the control signals for the I and Q channel interpolation filters are programmed via the µP interface. Once the operational configuration for the device has been set, the 16-bit µP interface is used to input the I and Q data into the associated FIFOs. The FIFOs provide the data interface between the µP and either the FM modulator or the shaping filters. Multiplexers route the I data to the FM modulator in the FM with bandlimiting filter mode. Both I and Q are routed to the 256 tap FIR shaping filters in the QASK mode. The shaping filter serves to both shape and interpolate the sample rate to 4, 8, or 16 times the input sample rate. The I shaping filter output can also be routed to the FM modulator for the FM with pulse shaping mode. Multiplexers select either the FM modulator output or the shaping filter output to be scaled and routed to the interpolation filters. The I and Q interpolation filters allow a non-integer increase in sample rate, up to the reference clock rate. The interpolation filter output data is upconverted or modulated by the Carrier NCO and multipliers. The modulated signal is added to modulated inputs from other cascaded DUC’s. The output formatter sets the output buffer state and the output data format. Programmable FIFO The Programmable FIFOs provide a data storage and interface between the microprocessor data write holding register and the shaping filter or the FM modulator. Signal routing out of the FIFO is set by the modulation format. Each FIFO has seven 16-bit registers. Figure 1 shows the conceptual details of the I and Q FIFOs. FIGURE 1. I AND Q FIFO BLOCK DIAGRAM 8:1 MUX ZERO’S RTH(2:0) 8:1 MUX WR A(000) WR A(001) WRITE SHIFT ENABLE WRITE SHIFT ENABLE IIN(15:0) QIN(15:0) A(2:0) IFIFO(15:0) QFIFO(15:0) FIFORDY † ALL REGISTERS ARE CLOCKED AT REFCLK UNLESS SHOWN OTHERWISE R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > WR R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > R E G > WR DFF1 DFF2 DFF3 DFF4 FM ENABLED DFF1 DFF2 DFF3 DFF4 FIGURE 2. FIFORDY AND DATA DELAY TIMING REFCLK WR DLY DATA DFF 1 DFF 2 DFF 3 DFF 4 REG1 FIFORDY WR SHFT EN 123 4 FIFO NEEDS MORE DATA FIFO NEEDS MORE DATA HSP50215 |
Similar Part No. - HSP50215VC |
|
Similar Description - HSP50215VC |
|
|
|
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 |
| 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
