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DS33Z41 Quad IMUX Ethernet Mapper

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9 DEVICE REGISTERS

Ten address lines are used to address the register space. Table 9-1 shows the register map for the DS33Z41.

The addressable range for the device is 0000h to 08FFh. Each Register Section is 64 bytes deep. Global

Registers are preserved for software compatibility with multiport devices. The Serial Interface (Line) Registers are

used to configure the serial port and the associated transport protocol. The Ethernet Interface (Subscriber)

registers are used to control and observe the Ethernet port. The registers associated with the MAC must be

configured through indirect register write /read access due to the architecture of the device.

When writing to a register input values for unused bits and registers (those designated with “–“) should be zero

unless specifically noted otherwise, as these bits and registers are reserved. When a register is read from, the

values of the unused bits and registers should be ignored. A latched status bit is set when an event happens and

is cleared when read.

The register details are provided in the following tables.

Table 9-1. Register Address Map

Global Registers Arbiter BERT Serial Interface Ethernet

Interface

0000h – 003Fh 0040h – 007Fh 0080h – 00BFh - -

Port 1

- - - 00C0h – 013Fh 0140h – 017Fh

Reserved address space: 0180h - 07FFh.

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Maxim DS33Z41 Spezifikationen Seite 60