MPC8540 datasheet(625/1302 Pages) FREESCALE

Part #	MPC8540

Description	MPC8540 PowerQUICC III??Integrated Host Processor Reference Manual

PDF	1302 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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625 / 1302 page

Initialization/Application Information

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

Freescale Semiconductor

13-121

Figure 13-92 shows read timing required by the EHPI in non-multiplexed mode.

Figure 13-92. EHPI Non-Multiplexed Read Timings

Figure 13-93 shows write timing required by the EHPI in non-multiplexed mode.

Figure 13-93. EHPI Non-Multiplexed Write Timings

13.5.6.3.1 Expansion to Multiple DSPs

The connection shown above can be adapted easily to interface to multiple DSPs instead of only

one. Each DSP host port needs to receive its own chip select and interrupt signals, and HRDY must

be connected differently, depending on which DSP is used. All other signals can be connected to

all host ports in parallel.

HCS

HDS

HR/W

HA[18:0]

HD[15:0]

HRDY†

Data

Valid Address

† While HCS is not selected, HRDY is in Hi-Z state.

HCS

HDS

HR/W

HA[18:0]

HD[15:0]

HRDY†

Valid Address

Data Valid

Valid Address

† While HCS is not selected, HRDY is in Hi-Z state.

MPC8540 Datasheet(PDF) 625 Page - Freescale Semiconductor, Inc