AX88871AP datasheet(13/30 Pages) ASIX

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AX88871AP Bripeater

ASIX ELECTRONICS CORPORATION

2.5 Miscellaneous

Signal Name

Type Pin No.

Description

LCLK

169

Local Clock : Must be run at 25Mhz . Used for transmit data to PHY devices,

/RST

167

Reset : The chip is reset when this signal is asserted Low.

DAISY_IN

/LSEL10

I/PU

135

Repeater Identification Number Daisy-Chain In : When MODE=” 1” , This

pin is a daisy chain serial input for Repeater ID. A state machine always

monitor the input if a correct data (RID) present at the pin, the (RID+1) will

be written to RID register and override the power on setup RID for the chip.

/LSEL10 : When MODE=” 0” , This pin select 10Mbps global LED status

(

utilization (%) and collision (%) ) when ‘ low’ ; Otherwise , 100Mbps

LED status is selected.

DAISY_OUT

/LCOL10

O/ML

136

Repeater Identification Number Daisy-Chain Out : When MODE=” 1” , This

pin is periodically shift out the RID of itself to the next chained chip to

inform that this ID has already been occupied. The RID is shift out

periodically every about 200us.

/LCOL : When MODE=” 0” , This pin drives 10Mbps collision LED directly.

MCLK

MII Clock Out : 2.5MHz 10Mbps MII reference clock

MDO

Station Management Data Out : For setup PHY auto-negotiation registers.

A burst write commands are issue to setup PHY register after reset. The PHY

address 4h, 5h, 6h, 7h, 8h, 9h,Ah and Bh will be written as register 4h to

value 00A1h ( Advertise register set to 10/100 half-duplex mode)and register

0h to value 1000h(Enable auto-negotiation).

MDC

Station Management Data Clock Out : For MDO reference clock.

TEST

I/PD

166

Test Pin : The pin is just for test mode setting purpose only. Must be pull low

when normal operation.

/HALF10

I/PU

170

Half-duplex mode in 10Mbps : Pull low with 10K ohm resister for 10Mbps

PHY in half-duplex mode.

VDD

1, 25, 50,

71, 78, 92

105, 128,

134, 161,

171, 183

POWER : +5V +/-5%

VSS

10, 26, 41

60, 77,

91, 114,

123, 133,

147, 156,

168, 184,

196

POWER: 0V

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