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DSP56857 Datasheet(PDF) 430 Page - Freescale Semiconductor, Inc

Part # DSP56857
Description  Digitial Signal Controller
PDF  662 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

DSP56857 Datasheet(HTML) 430 Page - Freescale Semiconductor, Inc

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Features
5685X Digital Signal Controller User Manual, Rev. 4
16-4
Freescale Semiconductor
16.2.2 Host Side
•
Signals (16 pins)
— HD7–HD0 data bus
— HA2-HA0 Host Address bus
—HRW / HRD - Host Read Write select (HRW) or Host Read (HRD) strobe
— HDS / HWR - Host Data Strobe (HDS) or Host Write (HWR) strobe
—HCS Host Chip Select
—HREQ / HTRQ - Host Request (HREQ) or Host Transmit Request (HTRQ)
— HACK / HRRQ - Host Acknowledge (HACK) or Host Receive Request (HRRQ)
•
Mapping
— Consecutive byte locations
— Memory or I/O-mapped peripheral for microprocessors, microcontrollers, etc.
•
Eight-bit data word
•
Transfer modes
— Mixed 8- and 16-bit data transfers
—DSC-to-Host
—Host-to-DSC
— Host Command
•
Handshaking protocols
— Software polled
— interrupt driven
•
Dedicated interrupts
— Separate interrupt lines for each interrupt source
— Special host commands force core interrupts under Host Processor control, useful for:
— Real-time production diagnostics
— Debugging window for program development
— Host control protocols



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