DP83850CVF datasheet(9/37 Pages) NSC

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2.0 Pin Descriptions (Continued)

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2.5 Pin Type Designation

PART[5:0]

O, L

—

Partition: Used to indicate each port's Jabber and Partition status. PART[3:0] cycle

through each port number (0-11) continuously. PART[4] indicates the Partition status

for each port (1 = Port Partitioned). PART[5] indicates the Jabber status for each port

(1 = Port Jabbering). These pins are intended to be decoded to drive LEDs.

RID_ER

O, L

high

Repeater ID Error: This pin is asserted under the conditions which set the RID_error

bit in the DEVICEID register.

RSM[3]

/RXECONFIG

I/O, L

—

Repeater State Machine Output/ RXE Polarity: This pin is an input during reset and

it is used to latch the desired polarity of RXE[11:0] signals.

When this pin is pulled high or it is unconnected, then the RXE signals become active

high. However, if this signal is pulled low, then the RXE signals become active low.

In all other non-reset times, this pin reﬂects the output of the Repeater State Machine.

RSM[3]

RSM[2:0]

I/O, L O, L

—

Test Outputs indicating the state of the Repeater State Machine.

RSM[3:0]

State

idle

collision

one port left

repeat

noise

Other states are undeﬁned.

MODE[1:0]

—

Mode Inputs: The 100RIC may be conﬁgured in the following modes:

MODE[1:0]

Operation

0,0

No special modes selected

1,0

Test mode

0,1

Test mode

1,1

Preamble regeneration (T4) mode

Note: A table showing pin type designation is given in section 2.5

Signal Name

Type

Active

Pin Description

Pin Type

Description

Input Buffer

Output Buffer, driven high or low at all times

I/O/Z

Bi-directional Buffer with high impedance output

O/Z

Output Buffer with high impedance capability

Open Collector like signals. These buffers are

either driven low or in a high-impedance state.

Output low drive: 4 mA

Output medium drive: 12 mA

Output high drive : 24 mA

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