Maxim DS33Z41 specifications Device Registers, Register Address Map, Bert

DS33Z41 Quad IMUX Ethernet Mapper

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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