WM8234 datasheet(39/144 Pages) CIRRUS

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WM8234

Rev 4.6

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R11 (0Bh)

7:4

FLAG_S3[3:0]

0001

output dataflag as S3

(valid only LVDS mode)

0000 = always low, 0001 = start flag

0010 = reserved, 0011 = reserved, 0100 = reserved

0101 = channel ID[0], 0110 = channel ID[1],

0111 = channel ID[2], 1000 = reserved

1001 = reserved, 1010 = reserved, 1011 = reserved,

1100 = reserved, 1101 = reserved, 1110 = reserved

1111 = always high

3:0

FLAG_S2[3:0]

0000

output dataflag as S2

(valid only LVDS mode)

0000 = always low, 0001 = start flag

0010 = reserved, 0011 = reserved, 0100 = reserved

0101 = channel ID[0], 0110 = channel ID[1],

0111 = channel ID[2], 1000 = reserved

1001 = reserved, 1010 = reserved, 1011 = reserved,

1100 = reserved, 1101 = reserved, 1110 = reserved

1111 = always high

R12 (0Ch)

3:0

FLAG_S4[3:0]

0000

output dataflag as S4

(valid only LVDS mode)

0000 = always low, 0001 = start flag

0010 = reserved, 0011 = reserved, 0100 = reserved

0101 = channel ID[0], 0110 = channel ID[1],

0111 = channel ID[2], 1000 = reserved

1001 = reserved, 1010 = reserved, 1011 = reserved,

1100 = reserved, 1101 = reserved, 1110 = reserved

1111 = always high

TG MASK TIMING

The WM8234 has TG clock mask function. M1, M2 and M3 pulse specifies the mask period; T1 and

T2 pulses are used for changing the signal polarity during the mask period. C_CK1 and C_CK2 are

applied to the M pulse only; they cannot be applied to the T pulse. C_CK3 and C_CK4 are applied to

M1 and T1; C_CK5 and C_CK6 are applied to M2 and T2. The mask timing is synchronized with

TGCKO rise edge.

N-1

CKGO3

(Internal)

VSMP

TGCK

pixcnt

TGCKO

N+1

M-2

N+2

M+1

C_CK3

M+2

M+3

M-1

N+3

M2@TGCK

rise@count N

High@TP2

CKGO3 + M2

T2@TGCK

Low@TP1

TP1

TP2

M-1

fall@count M-1

TP1

TP2

Figure 22 TG Mask Timing

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