DP83849IFVSSLASHNOPB datasheet(91/108 Pages) TI2

91 / 108 page

DP83849IF

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SNOSAX8D – JUNE 2009 – REVISED APRIL 2013

10.2.8

CD Test and BIST Extensions Register (CDCTRL1)

This register controls test modes for the 10BASE-T Common Driver. In addition it contains extended

control and status for the packet BIST function.

Table 10-23. CD Test and BIST Extensions Register (CDCTRL1), address 1Bh

Bit

Bit Name

Default

Description

15:8

BIST_ERROR_COUNT

0, RO

BIST ERROR Counter:

Counts number of errored data nibbles during Packet BIST. This value

will reset when Packet BIST is restarted. The counter sticks when it

reaches its max count.

7:6

RESERVED

0, RW

RESERVED: Must be zero.

BIST_CONT_MODE

0, RW

Packet BIST Continuous Mode:

Allows continuous pseudo random data transmission without any break

in transmission. This can be used for transmit VOD testing. This is used

in conjunction with the BIST controls in the PHYCR Register (19h). For

10Mb operation, jabber function must be disabled, bit 0 of the 10BTSCR

(1Ah), JABBER_DIS = 1.

CDPATTEN_10

0, RW

CD Pattern Enable for 10Mb:

1 = Enabled.

0 = Disabled.

RESERVED

0, RW

RESERVED: Must be zero.

10MEG_PATT_GAP

0, RW

Defines gap between data or NLP test sequences:

1 = 15 µs.

0 = 10 µs.

1:0

CDPATTSEL[1:0]

00, RW

CD Pattern Select[1:0]:

If CDPATTEN_10 = 1:

00 = Data, EOP0 sequence.

01 = Data, EOP1 sequence.

10 = NLPs.

11 = Constant Manchester 1s (10 MHz sine wave) for harmonic distortion

testing.

10.2.9 Phy Control Register 2 (PHYCR2)

This register provides additional general control.

Table 10-24. Phy Control Register 2 (PHYCR2), address 1Ch

Bit

Bit Name

Default

Description

15:1

RESERVED

0, RO

RESERVED: Writes ignored, read as 0.

SOFT_RESET

0, RW/SC

Soft Reset:

Resets the entire device minus the registers - all configuration is

preserved.

1= Reset, self-clearing.

8:0

RESERVED

0, RO

RESERVED: Writes ignored, read as 0.

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