MDS105 参数 Datasheet PDF下载

MDS105

10.0

Management Interface

Data Sheet

The MDS105 uses a standard parallel port interface to provide external CPU access to the internal registers. This

parallel interface is composed of 3 pins: DATA0, STROBE, and ACK. The DATA0 pin provides the address and data

content input to the MDS105, while the ACK pin provides the corresponding output to the external CPU. The

STROBE pin is provided as the clock for both serial data streams. Any of the MDS105 internal registers can be

modified through this parallel port interface

1

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Figure 3 - Write Command

Figure 4 - Read Command

Each management interface transfer consists of four parts:

1. A START pulse – occurs when DATA is sampled high when STROBE is rising followed by DATA being sampled

low when STROBE falls.

2. Register address strobed into DATA0 pin, using the high level of the STROBE pin.

3. Either a read or write command (see waveforms above).

4. Data to be written provided on DATA0, or data to be read provided on ACK.

Any command can be aborted in the middle by sending an ABORT pulse to the MDS105. An ABORT pulse occurs

when DATA is sampled low and STROBE is rising, followed by DATA being sampled high when STROBE falls.

1. The 3-bit parallel interface is not “parallel” in the usual sense of the word; it is actually a synchronous serial architecture. However, the

MDS105 management interface adheres to IEEE 1284 parallel port standards.

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Zarlink Semiconductor Inc.