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TMS320VC5441APGF Datasheet(PDF) 35 Page - Texas Instruments

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Part # TMS320VC5441APGF
Description  TMS320VC5441 Fixed-Point Digital Signal Processor
PDF  86 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS320VC5441APGF Datasheet(HTML) 35 Page - Texas Instruments

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Functional Overview
26
December 1999 – Revised April 2002
SPRS122E
3.2.2.4
HPI Nonmultiplexed Mode
In nonmultiplexed mode, a host with separate address/data buses can access the HPI16 data register (HPID)
via the 16-bit HD bidirectional data bus, and the address register (HPIA) via the 19-bit HA address bus. The
HA[18] signal is used to make selection between program (shared) memory and data (local) memory access.
Table 3–4 shows the memory selection via HA[18].
Table 3–4. HPI Local/Shared Memory Selection Via HA[18]
HA[18]
Memory Type
0
Local (data)
1
Shared (program)
The host initiates the access with the strobe signals (HDS1, HDS2, and HCS) and controls the direction of
the access with the HR/W signal. The HPI16 can stall host accesses via the HRDY signal. Note that the HPIC
register is not available in nonmultiplexed mode since there are no HCNTL signals available. All host accesses
initiate a DMA read or write access. Figure 3–12 shows a block diagram of the HPI16 in nonmultiplexed mode.
HOST
HPI-16
Data[15:0]
HD[15:0]
R/W
HR/W
Data strobes
HDS1, HDS2, HCS
HRDY
Ready
HPID[15:0]
DMA
C54x
CPU
Address[n:0]†
HA[n :0]†
† n = 0 to 18
Figure 3–12. Interfacing to the HPI-16 in Non-Multiplexed Mode



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