ADIN1110BCPZ-R7 datasheet(29/107 Pages) AD

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Data Sheet

ADIN1110

APPLICATIONS INFORMATION

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Rev. B | 29 of 107

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Internal free-running counter

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Syntonized counter

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Waveform generation on TS_TIMER output

Internal Free Running Counter

The ADIN1110 has an internal free running counter running at 120

MHz. This counter provides an accuracy of 8.333 ns. When using

this counter, there is a period of approximately 35 s. This period

ensures that the clock does not wrap during any of the necessary

operations, for example, between receipt of peer delay request and

transmission of the response.

To enable the free running counter, the TS_EN bits must be set to

When the free running counter is enabled, the ADIN1110 captures

the time stamp for all received frames, and it is appended before

each data frame received. The time stamps of transmitted frames

are captured when requested. See Time Stamp Capture for more

details.

The value of the free running counter can be captured using the

input capture signal (TS_CAPT), capturing the value of the counter

in the TS_FREECNT_CAPT register.

Syntonized Counter

The syntonized counter is a 64-bit counter in which the lower 32

bits represent nanoseconds with 1 LSB = 1 ns. When the lower 32

bits reach the value stored in TS_1SEC_CMP, these bits clear and

the upper 32 bits increment representing seconds.

To enable the syntonized counter, the TS_EN bits must be set to 1.

Three modes are supported for capturing time stamps for transmit-

ted and received frames, as follows:

1. Capture a 2-bit sec and a 30-bit ns time stamp as defined in the

OPEN Alliance Specification Section 7.8. See the Configuration

2. Capture a 32-bit sec and a 30-bit ns time stamp as defined in

the OPEN Alliance Specification Section 7.8. See the Configu-

ration Register 0 section.

3. Capture the 32-bit free running counter. See the Timer Configu-

ration Register section.

To enable capturing of time stamps for transmitted and received

frames, set FTSE (CONFIG0 register) to 1.

Waveform Generation on TS_TIMER Output

The ADIN1110 can generate an output signal (TS_TIMER) that

uses two counters to generate repeating waveforms driven by the

syntonized time. These two counters, TS_TIMER_HI and TS_TIM-

ER_LO, specify the high and low period of the TS_TIMER signal

and need to be programmed with multiples of 16 because they are

driven by the syntonized time.

Because it is frequent that the required period of TS_TIMER cannot

be programmed as a multiple of 16, the quantization error correc-

tion register can be programmed with a value between 0 and 15 to

compensate for the TS_TIMER quantization error.

It is possible to specify a time with respect to the 64-bit synton-

ized timer to start the generation of the TS_TIMER output. The

TS_TIMER_START register can be programmed with a value that is

compared with the nanoseconds portion of the syntonized counter

to generate a one-shot start.

The sequence to enable the TS_TIMER output is as follows:

1. If required, change the default value of the TS_TIMER output

from 0 to 1 by writing to the TS_TIMER_DEF bits.

2. Write the values required for the high and low times for the

TS_TIMER output to the TS_TIMER_HI and TS_TIMER_LO

registers.

3. Write the value required for the quantization error correction to

the TS_TIMER_QE_CORR register.

4. Write a start time to the TS_TIMER_START registers. When the

nanoseconds part of the syntonized counter matches this value,

TS_TIMER starts toggling.

The TS_TIMER output can be stopped by writing 1 to the TS_TIM-

ER_STOP bits. When the TS_TIMER output is stopped, the output

goes back to the default value specified in TS_TIMER_DEF.

ELECTROMAGNETIC COMPATIBILITY (EMC)

AND ELECTROMAGNETIC IMMUNITY (EMI)

The ADIN1110 was tested at the system level for EMC and EMI.

Table 21 summarizes the results.

Table 21. EMC/EMI Tests Conducted on ADIN1110 at System Level

EMC/EMI Test

Withstand Threshold

IEC 61000-4-4 Electrical Fast Transient (EFT)

±4 kV

IEC 61000-4-2 ESD (Contact Discharge)

±4 kV

IEC 61000-4-2 ESD (Air Discharge)

±8 kV

IEC 61000-4-5 Surge

±4 kV

IEC 61000-4-6 Conducted Immunity

10 V/m

IEC 61000-4-3 Radiated Immunity

Class A

EN 55032 Radiated Emissions

Class B

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