ADIN1300BCPZ-R7 datasheet(66/79 Pages) AD

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ADIN1300

Data Sheet

Rev. 0 | Page 66 of 79

Start of Packet Receive Detection Delay Register

Address: 0x9429, Reset: 0x0000, Name: SOP_RX_DEL

This register controls the receive side SOP detection delay.

Table 95. Bit Descriptions for SOP_RX_DEL

Bits

Bit Name

Description

Reset

Access

[15:11]

SOP_RX_10_DEL_NCYC

This bit field specifies the number of cycles of the MII RX_CLK clock to delay the

received frames SOP indication for 10BASE-T links.

0x0

R/W

[10:6]

SOP_RX_100_DEL_NCYC

This bit field specifies the number of cycles of the MII RX_CLK clock to delay the

received frames SOP indication for 100BASE-TX links.

0x0

R/W

[5:0]

SOP_RX_1000_DEL_NCYC

This register field specifies the number of cycles of the receive clock (for example,

8 ns cycles) to delay the received frames SOP indication for 1000BASE-T links. It is

mainly intended to support MAC interfaces with long latency in Gigabit mode

(like SGMII) so that the received frame SOP indication is not asserted before the

MAC receives the frame.

0x0

R/W

Start of Packet Transmit Detection Delay Register

Address: 0x942A, Reset: 0x0000, Name: SOP_TX_DEL

This register controls the transmit side SOP detection delay.

Table 96. Bit Descriptions for SOP_TX_DEL

Bits

Bit Name

Description

Reset

Access

[15:13]

RESERVED

Reserved.

0x0

[12:8]

SOP_TX_10_DEL_N_8_NS

This bit field specifies the number of 8 ns periods to delay the transmitted frames

SOP indication for 10BASE-T links. To align the transmit SOP indication assertion

close to the reference point set on the MDI pins, set this register to 5'd20.

0x0

R/W

[7:4]

SOP_TX_100_DEL_N_8_NS

This bit field specifies the number of 8 ns periods to delay the transmitted frames

SOP indication for 100BASE-TX links. To align the transmit SOP indication

assertion close to the reference point set on the MDI pins, set this register to 4'd0.

0x0

R/W

[3:0]

SOP_TX_1000_DEL_N_8_NS

This bit field specifies the number of 8 ns periods to delay the transmitted frames

SOP indication for 1000BASE-T links. To align the transmit SOP indication assertion

close to the reference point set on the MDI pins (so that the timestamping

point does not have to be adjusted at the MAC/switch side), set this register to

4'd6.

0x0

R/W

Control of FIFO Depth for MII Modes Register

Address: 0x9602, Reset: 0x0001, Name: DPTH_MII_BYTE

FIFO depth in bytes in MII modes.

Table 97. Bit Descriptions for DPTH_MII_BYTE

Bits

Bit Name

Description

Reset

Access

[15:1]

RESERVED

Reserved.

0x0

DPTH_MII_BYTE

Applies to MII modes for 10 Mbps and 100 Mbps. When set, the FIFO depth is in bytes. When

zero, the FIFO depth is in nibbles. The default value of this bit is 1. Therefore, the FIFO prefill

is set in bytes. In MII mode, because the interface is nibble based, the internal prefill in the

transmit FIFO is larger and, therefore, the latency is longer.

0x1

R/W

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