AD9554 datasheet(91/116 Pages) AD

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Data Sheet

AD9554

Rev. D | Page 91 of 116

Table 100. Reference Input Validation Timeout

Address

Bits

Bit Name

Description

0x0A02

[7:4]

Reserved

Default: 0x0.

REFD timeout

If REFD is unfaulted, setting this autoclearing bit forces the reference validation timer for

REFD to zero, thus making it valid immediately. Default = 0b.

REFC timeout

If REFC is unfaulted, setting this autoclearing bit forces the reference validation timer for

REFC to zero, thus making it valid immediately. Default = 0b.

REFB timeout

If REFB is unfaulted, setting this autoclearing bit forces the reference validation timer for

REFB to zero, thus making it valid immediately. Default = 0b.

REFA timeout

If REFA is unfaulted, setting this autoclearing bit forces the reference validation timer for

REFA to zero, thus making it valid immediately. Default = 0b.

Table 101. Force Reference Input Fault

Address

Bits

Bit Name

Description

0x0A03

[7:4]

Reserved

Default: 0x0

REFD fault

Faults REFD input receiver

0 (default) = not faulted

1 = faulted (REFD is not used)

REFC fault

Faults REFC input receiver

0 (default) = not faulted

1 = faulted (REFC is not used)

REFB fault

Faults REFB input receiver

0 (default) = not faulted

1 = faulted (REFB is not used)

REFA fault

Faults REFA input receiver

0 (default) = not faulted

1 = faulted (REFA is not used)

Table 102. Reference Input Monitor Bypass

Address

Bits

Bit Name

Description

0x0A04

[7:4]

Reserved

Default: 0x0

REFD monitor bypass

Bypasses REFD input receiver frequency monitor; setting this bit to 1 forces REFD to be

unfaulted as long as the REFD fault bit in Register 0x0A03 is not set.

0 (default) = REFD frequency monitor not bypassed.

1 = REFD frequency monitor bypassed.

REFC monitor bypass

Bypasses REFC input receiver frequency monitor; setting this bit to 1 forces REFC to be

unfaulted as long as the REFC fault bit in Register 0x0A03 is not set.

0 (default) = REFC frequency monitor not bypassed.

1 = REFC frequency monitor bypassed.

REFB monitor bypass

Bypasses REFB input receiver frequency monitor; setting this bit to 1 forces REFB to be

unfaulted as long as the REFB fault bit in Register 0x0A03 is not set.

0 (default) = REFB frequency monitor not bypassed.

1 = REFBB frequency monitor bypassed.

REFA monitor bypass

Bypasses REFA input receiver frequency monitor; setting this bit to 1 forces REFA to be

unfaulted as long as the REFA fault bit in Register 0x0A03 is not set.

0 (default) = REFA frequency monitor not bypassed.

1 = REFA frequency monitor bypassed.

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