DS21554L Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS21554L

3.3V/5V E1 Single-Chip Transceivers

Maxim Integrated 

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers

Signal Name:

RD (DS)

Signal Description: Read Input—Data Strobe

Signal Type:

Input

In Intel Mode, RD determines when data is read from the device. In Motorola Mode, DS is used to write

to the device. See the Bus Timing Diagrams section.

Signal Name:

CS

Signal Description: Chip Select

Signal Type:

Input

Must be low to read or write to the device. CS is an active-low signal.

Signal Name:

ALE (AS)/A7

Signal Description: Address Latch Enable (Address Strobe) or A7

Signal Type:

Input

In nonmultiplexed bus operation (MUX = 0), serves as the upper address bit. In multiplexed bus

operation (MUX = 1), serves to demultiplex the bus on a positive-going edge.

Signal Name:

WR (R/W)

Signal Description: Write Input (Read/Write)

Signal Type:

Input

WR is an active-low signal.

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