WM8234 datasheet(36/144 Pages) CIRRUS

36 / 144 page

WM8234

Rev 4.6

TG PULSE

WM8234 can be generated 8 TG pulse internally (PO0

– PO7). These pulses are generated by toggle

point setting register (TP*) and polarity setting register (POL*_PO*). WM8234 provided up to 32 toggle

point by using TP0 to TP31. PO0-PO7 signals can be assigned to CLK2-CLK11 by SEL_PCK* and

SEL_CLK* register.

TRIGGER DATA

WM8234 can implement trigger data in LVDS flag data (S0, S1, S2, S3 and S4). This can be selected

from two methods. One is FLAGPIX register, this can be set one pixel by each line. The other is to

apply PO* pulse. Figure 21 shows the trigger data implementation timing.

CHANNEL ID

Also WM8234 can implement channel identification data instead of trigger data. Table 12 shows the

matrix of input channel and channel ID.

ID[2]

ID[1]

ID[0]

IN1

IN2

IN3

IN4

IN5

IN6

Table 12 Channel ID

Channel ID can be assigned to flag data (S0, S1, S2, S3 or S4). The following is the example of

channel ID assignment.

Example: Assigned channel ID to flag data as ID[2] =S1, ID[1]=S2, ID[0]=S3.

If output data is as follows, channel ID will be IN1. (i.e. ID[2]=S1=0, ID[1]=S2=0, ID[0]=S3=1)

IN1[0]

IN1[1]

IN1[2]

IN1[3]

IN1[4]

IN1[5]

IN1[6]

IN1[7]

IN1[8]

IN1[9]

IN2[0]

IN2[1]

IN2[2]

IN2[3]

IN2[4]

IN2[5]

IN2[6]

IN2[7]

IN2[8]

IN2[9]

IN3[0]

IN3[1]

IN3[2]

IN3[3]

IN3[4]

IN3[5]

IN3[6]

IN3[7]

IN3[8]

IN3[9]

DCLK

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