DS33Z41 Quad IMUX Ethernet Mapper

 

 

 

 

 

 

NAME

PIN

TYPE

FUNCTION

 

 

 

 

 

 

 

 

 

Read Data Strobe (Intel Mode). The DS33Z41 drives the data bus

 

 

 

 

(D0-D7) with the contents of the addressed register while RD and CS

 

RD/DS

E1

I

are both low.

 

Data Strobe (Motorola Mode). Used to latch data through the

 

 

 

 

 

 

 

 

microprocessor interface. DS must be low during read and write

 

 

 

 

operations.

 

 

 

 

Write (Intel Mode). The DS33Z41 captures the contents of the data

 

 

 

 

bus (D0:D7) on the rising edge of WR and writes them to the addressed

 

WR/RW

E2

I

register location. CS must be held low during write operations.

 

Read Write (Motorola Mode). Used to indicate read or write

 

 

 

 

 

 

 

 

operation. RW must be set high for a register read cycle and low for a

 

 

 

 

register write cycle.

 

 

 

 

Interrupt Output. Outputs a logic zero when an unmasked interrupt

 

 

 

 

event is detected. Outputs a logic zero when an unmasked interrupt

 

 

F3

OZ

event is detected. INT is deasserted when all interrupts have been

 

INT

acknowledged and serviced. Active low. Inactive state is programmable

 

 

 

 

in register GL.CR1. is deasserted when all interrupts have been

 

 

 

 

acknowledged and serviced. Active low. Inactive state is programmable

 

 

 

 

in register GL.CR1.

 

 

 

 

Reset. An active-low signal on this pin resets the internal registers and

 

 

 

 

logic. This pin should remain low until power, SYSCLKI, RX_CLK, and

 

RST

D8

I

TX_CLK are stable, then set high for normal operation. This input

 

 

 

 

requires a clean edge with a rise time of 25ns or less to properly reset

 

 

 

 

the device.

 

 

 

 

Mode Control

 

MODEC[0]

D6

I

00 = Read/Write Strobe Used (Intel Mode)

 

01 = Data Strobe Used (Motorola Mode)

 

MODEC[1]

D7

 

 

10 = Reserved. Do not use.

 

 

 

 

 

 

 

 

11 = Reserved. Do not use.

 

 

 

 

DCE or DTE Selection. The user must set this pin high for DCE Mode

 

 

 

 

selection or low for DTE Mode. In DCE Mode, the DS33Z41 MAC port

 

DCEDTES

A13

I

can be directly connected to another MAC. In DCE Mode, the Transmit

 

clock (TX_CLK) and Receive clock (RX_CLK) are output by the

 

 

 

 

DS33Z41. Note that there is no software bit selection of DCEDTES.

 

 

 

 

Note that DCE Mode is only relevant when the MAC interface is in MII

 

 

 

 

mode.

 

RMIIMIIS

C4

I

RMII or MII Selection. Set high to configure the MAC for RMII

 

interfacing. Set low for MII interfacing.

 

 

 

 

 

 

 

 

 

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Image 17
Maxim DS33Z41 specifications Mode Control