CS8427-CSZ datasheet(37/59 Pages) CIRRUS

37 / 59 page

CS8427

DS477F3

11.17 User Data Buffer Control (13h)

UD - User data pin (U) direction specifier If this bit is changed during normal operation, then always stop the CS8427

first (RUN = 0), write the new value, then start the CS8427 (RUN = 1).

Default = ‘0’

0 - The U pin is an input. The U data is latched in on both rising and falling edges of

OLRCK. This setting also chooses the U pin as the source for transmitted U data.

1 - The U pin is an output. The received U data is clocked out on both rising and falling edges

of ILRCK. This setting also chooses the U data buffer as the source of transmitted U data.

UBM1:0 - Sets the operating mode of the AES3 U bit manager

Default = ‘00’

00 - Transmit all zeros mode

01 - Block mode

10 - Reserved

11 - Reserved

DETUI - D to E U-data buffer transfer inhibit bit (valid in block mode only).

Default = ‘0’

0 - Allow U-data D to E buffer transfers

1 - Inhibit U-data D to E buffer transfers

EFTUI - E to F U-data buffer transfer inhibit bit (valid in block mode only).

Default = ‘0’

0 - Allow U-data E to F buffer transfers

1 - Inhibit U-data E to F buffer transfer

11.18 Q-Channel Subcode Bytes 0 to 9 (14h - 1Dh) (Read Only)

The following 10 registers contain the decoded Q-channel subcode data

Each byte is LSB first with respect to the 80 Q-subcode bits Q[79:0]. Thus bit 7 of address 14h is Q[0]

while bit 0 of address 14h is Q[7]. Similarly bit 0 of address 1Dh corresponds to Q[79].

UBM1

UBM0

DETUI

EFTUI

CONTROL

ADDRESS

TRACK

INDEX

MINUTE

SECOND

FRAME

ZERO

ABS MINUTE

ABS SECOND

ABS FRAME

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