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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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DSP56857 데이터시트(PDF) 430 Page - Freescale Semiconductor, Inc |
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DSP56857 데이터시트(HTML) 430 Page - Freescale Semiconductor, Inc |
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430 / 662 page  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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