AX88852 datasheet(31/39 Pages) ASIX

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AX88850

PRELIMINARY

ASIX ELECTRONICS CORPORATION

4.10 Device ID Register (DEVICEID)

Page 0 Address 5h

Bit

Bit Name

Access

Bit Description

D15-D13

Temp

R/W

Temporary Registers : reserved for system programer used.

D12-D8

PORT_NUM

*R/W Port Number : These bit indicate the last or current receiving port number.

/IR_ACT_EN

*R/W Inter Repeater Active Input Pin Enable : This bit active low to enable

/IR_ACTI[7:0] pin as inter-repeater carrier sense detection input.

Otherwise, /IR_ACTI[7:0] pins is disable and only perform power-on

configuration inputs.

/TO_ID_CLR

R/W

Time Out to Clear repeater ID : Within the time out period, if no daisy

chain repeater ID input. The repeater ID will be clear to RID=0 .

Otherwise, the repeater ID will remain the previous value ( power on

configured value or previous daisy chain reconfigured value).The tome

out period is about 4 to 5 second.

/DIS_DAISY

R/W

Disable RID Daisy-chain Input: No matter what kind of data input from

DAISY_IN pin the RPTR_ID can’t be override.

D4-D0

RPTR_ID

R/W

Repeater ID : At the rising edge of /RST , the value of RID[4:0] are

latched in this register as D[4:0]. The setting of RID[2:0]can be override

according to the data from serial daisy-chain DAISY_IN pin input except

/DIS_DAISY is configured to “low” .

Note that in system application, the maximum of 8 devices can be

cascade. Therefore only RID[2:0] can be variation and the RID[4:3] must

be keep the same value in the same system and avoid conflicted with PHY

device ID.

* Note : Host can’t override these signals.

4.11 Silicon Revision Register

Page 1 Address 5h

Bit

Bit Name

Access

Bit Description

D15-D0

SI_REV[15:0]

Silicon Reversion : Currently reads all 1‘s

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