AX88871AP datasheet(10/30 Pages) ASIX

10 / 30 page

AX88871AP Bripeater

ASIX ELECTRONICS CORPORATION

2.2 Expansion Bus Interface for 100 Mbps

Signal Name

Type Pin No.

Description

HIRD[3:0]

/LACT[3:0]

I/O/Z

/PU

165-162 INTER REPEATER DATA : When MODE=” 1” , Nibble data input/output.

Transfer data from the “active” AX88871A to all other “inactive”

AX88871As. The bus-master of the IRD bus is determined by IR_VECT bus

arbitration.

/LACT[3:0] : When MODE=” 0” , Those pins drive activity[3:0] LEDs

directly.

/HIRD_V

/LACT[4]

I/O/Z

/PU

159

INTER REPEATER DATA VALID : When MODE=” 1” ,This signal reflect

the RX_DV status of the active port across the inter repeater bus. Used to

frame good packets.

/LACT[4] : When MODE=” 0” , This pin drives port 4 activity LED directly.

/HIRD_ER

/LACT[5]

I/O/Z

/PU

160

INTER REPEATER DATA ERROR: When MODE=” 1” ,This signal reflect

the RX_ER status of the active port across the inter repeater bus. Used to track

receive errors from the PHY in real time.

/LACT[5] : When MODE=” 0” , This pin drives port 5 activity LED directly.

HIRD_CK

/LACT[6]

I/O/Z

/PU

158

INTER REPEATER CLOCK VALID : When MODE=” 1” ,All inter repeater

signals are synchronized to the rising edge of this clock.

/LACT[6] : When MODE=” 0” , This pin drives port 6 activity LED directly.

HIRD_ODIR

/LACT[7]

157

INTER

REPEATER

DATA

IN/OUT

DIRECTION

When

MODE=” 1” ,This pin indicates the direction of data for external transceiver.

“High” = IRD[3:0], /IRD_ER, /IRD_V , IRD_CK are Output.

“Low” = IRD[3:0], /IRD_ER, /IRD_V , IRD_CK are Input.

/LACT[7] : When MODE=” 0” , This pin drives port 7 activity LED directly.

/HIR_ACTO[5:0]

/LPART[5:0]

I/O/OC 153-148 INTER REPEATER ACTIVITY IN/OUT: When MODE=” 1” , The local

repeater activity appearance, the signal of the related RID (Repeater ID) will

be asserted and as a output pin. All other pins serve as input pins but except

the collision conditions. When collision occurred , the signal of related

(RID-1) pins will also served as outputs and will active during local collision

period. The exception case is when RID = 0, then (RID-1) is replaced with

(RID+1).

/LPART[5:0] : When MODE=” 0” , Those pins drive partition[5:0] LEDs

directly.

/HIR_ACTO[7:6]

/LIR_ACT[3:2]

/LPART[7:6]

I/O/OC 155-1154 INTER REPEATER ACTIVITY IN/OUT: When MODE =” 1” and STACK

=” 1” the function is the same as /HIR_ACTO[5:0].

LOCAL REPEATER ACTIVITY IN/OUT : When MODE =” 1” and STACK

=” 0” the function is the same as /HIR_ACTO[5:0] but for local repeater

activity only.

/LPART[7:6] : When MODE=” 0” , Those pins drive partition[7:6] LEDs

directly.

/HIR_ACTI[5:0]

NC[5:0]

I/PU

144-139 INTER REPEATER ACTIVITY IN: These pins perform the same function

as /IR_ACTO[7:0] when they serve as input function. Then the

/IR_ACTO[7:0] insert external buffers the input function must be replaced

with /IR_ACTI [7:0].

NC : When MODE=” 0” , Those pins keep no connection.

/HIR_ACTI[7:6]

/LIR_ACT[1:0]

NC[7:0]

I/O/PU 146-145 INTER REPEATER ACTIVITY IN : When MODE =” 1” and STACK =” 1”

the function is the same as /HIR_ACTI[5:0].

LOCAL REPEATER ACTIVITY IN/OUT : When MODE =” 1” and STACK

=” 0” the function is the same as /HIR_ACTO[5:0] but for local repeater

activity only.

NC : When MODE=” 0” , Those pins keep no connection.

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