AX88871AP datasheet(14/30 Pages) ASIX

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AX88871AP Bripeater

ASIX ELECTRONICS CORPORATION

2.6 Power on configuration setup signals cross reference table

Signal Name

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Description

OPT[6]

COL_O[6]

OPT[6] : Option for external device type to connect to port 6. Default ‘high’

is for PHY type device. Otherwise, ‘low’ for bridge, switch or MAC type

device.

OPT[7]

COL_O[7]

OPT[7] : Option for external device type to connect to port 7. Default ‘high’

is for PHY type device. Otherwise, ‘low’ for bridge, switch or MAC type

device.

OPT[0]

TXEN7

OPT[0] : Option for LED display. Default ‘high’ for normal operation. User

may pull the pin ‘low’ with 10K ohm resister to force 10M or 100M LED

disable when all the ports are the same speed condition.

OPT[1]

TXD[5][3]

OPT[1] : Option for partition schime. Default ‘high’ for normal operation.

User may pull the pin ‘low’ with 10K ohm resister to force hardly enter

partition state.

TXM_MODE

TXD[6][3]

TXM_MODE : Option for internal used. Default ‘high’ user may pull the pin

‘low’ with 10K ohm resister for reserve transmition mode alternaty.

MODE

TXD[6][2]

MODE = 0 : Single chip repeater application.

MODE = 1 : Multiple chips cascaded repeater application.

OPT[3]

TXD[6][1]

OPT[3] : Option for internal used. Please keep the pin with default value.

EN_FLOW_CTL TXD[6][0]

EN_FLOW_CTL = 0 : Disable flow control function.

EN_FLOW_CTL = 1 : Enable flow control function.

ST_FW

TXD[7][3]

ST_FW : Default ‘high’ for Store and Forward mode. User may pull the pin

‘low’ with 10K ohm resister to seting to Fragment Free mode.

ENTRIES

TXD[7][2]

ENTRIES = 0 : 1024 entries supported

ENTRIES = 1 : 256 entries supported

MEM_SIZE[1]

MEM_SIZE[0]

TXD[7][1]

TXD[7][0]

MEM_SIZE[1] MEM_SIZE[0]

SIZE (K)

32K

64K

128K

256K

/IR_ACT_EN

/BMWR

Inter Repeater Active Input Pin Enable : This input active low to enable

/HIR_ACTI[7:0] pins as inter-repeater carrier sense detection input.

Otherwise, /HIR_ACTI[7:0] pins are disabled. The setup works only in

MODE = 1.

/DIS_DAISY

/BMA[15]

/DIS_DAISY : Default pull-up to enable daisy chain function. To disable

daisy chain function pull the pin down external.

STACK

TXD[5][2]

Stack option : Default is level one using the legacy expansion method to

cascade 8 repeater chips. When pull the pin low with 10K ohm resister, using

inter-repeater bus horizontally cascades 4 AX88771s and vertically cascades

6 repeaters maximum up-to 192 ports can be constructed.

LRID[1]

TXD[5][1]

Local Repeater Identification Number LRID[1]: When power on reset this pin

as inputs to setup the local repeater ID of the chip. LRID[1:0] indicate the

local repeater ID from 0 to 3.

LRID[0]

TXD[5][0]

Local Repeater Identification Number LRID[0]: When power on reset this pin

as inputs to setup the local repeater ID of the chip. LRID[1:0] indicate the

local repeater ID from 0 to 3.

RID[2]

MCLK

Repeater Identification Number RID[2]: When power on reset this pin as

inputs to setup the repeater ID of the chip. RID[2:0] indicate the repeater ID

from 0 to 7.

RID[1]

MDO

Repeater Identification Number RID[1]: When power on reset this pin as

inputs to setup the repeater ID of the chip. RID[2:0] indicate the repeater ID

from 0 to 7.

RID[0]

MDC

Repeater Identification Number RID[0]: When power on reset this pin as

inputs to setup the repeater ID of the chip. RID[2:0] indicate the repeater ID

from 0 to 7.

All of the above signals are pull-up for default values.

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