LAN8818D datasheet(91/101 Pages) MICROCHIP

91 / 101 page

LAN8818D

DS00005832C-page 91

6.6.13

1588 SERIAL TIMESTAMP INTERFACE (STI) FORMAT AND TIMING

This section specifies the 1588 Serial Timestamp Interface format and timing of the device.

6.6.14

1588_EVENT_B TIMING

This section specifies the 1588_EVENT_B timing of the device.

FIGURE 6-12:

1588 SERIAL TIMESTAMP INTERFACE FORMAT AND TIMING

TABLE 6-20:

1588 SERIAL TIMESTAMP INTERFACE TIMING VALUES

Symbol

Description

Min

Typ

Max

Unit

tclkp

1588_STI_CLK period

—

tclkduty

1588_STI_CLK duty cycle

—

tcs_val

1588_STI_CS_N output valid prior to rising edge

of 1588_STI_CLK

4—

—

tcs_hold

1588_STI_CS_N output hold time after rising

edge of 1588_STI_CLK

4—

—

tdo_val

1588_STI_DO output valid prior to rising edge of

1588_STI_CLK

4—

—

tdo_hold

1588_STI_DO output hold time after rising edge

of 1588_STI_CLK

4—

—

TABLE 6-21:

1588_EVENT_B TIMING VALUES

Symbol

Description

Min

Typ

Max

Unit

tclkp

LTC Time of Day to 1588_EVENT_B output

latency

15.0

—

21.0

Port

Frame Signature

Time Stamp

1588_STI_CS_N

1588_STI_CLK

1588_STI_DO

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