DS5000 Просмотр технического описания (PDF) - Maxim Integrated

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DS5000

Soft Microcontroller Module

Maxim Integrated 

DS5000(T) LOGICAL ADDRESS SPACES Figure 2

DS5000(T)

PROGRAM LOADING

The Program Load Modes allow initialization of the NV RAM Program/Data Memory. This initialization

may be performed in one of two ways:

1. Serial Program Loading that can perform Bootstrap Loading of the DS5000(T). This feature allows

the loading of the application program to be delayed until the DS5000(T) is installed in the end

system. Dallas Semiconductor strongly recommends the use of serial program loading because of its

versatility and ease of use.

2. Parallel Program Load cycles that perform the initial loading from parallel address/data information

presented on the I/O port pins. This mode is timing-set compatible with the 8751H microcontroller

programming mode.

The DS5000(T) is placed in its Program Load configuration by simultaneously applying a logic 1 to the

RST pin and forcing the PSEN line to a logic 0 level. Immediately following this action, the DS5000(T)

will look for a parallel Program Load pulse, or a serial ASCII carriage return (0DH) character received at

9600, 2400, 1200, or 300 bps over the serial port.

The hardware configurations used to select these modes of operation are illustrated in Figure 3.

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