WM8233 datasheet(36/146 Pages) CIRRUS

36 / 146 page

WM8233

Rev 4.7

TG PULSE

The WM8233 can generate 8 TG pulses internally (PO0

– PO7). These pulses are generated by the

toggle point setting registers (TP*) and polarity setting registers (POL*_PO*). WM8233 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

The WM8233 can implement trigger data in LVDS output.(S0,S1,S2,S3 and S4) This can be selected

by two methods. One is the FLAGPIX register which can be set one pixel for each line. The other is to

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

CHANNEL ID

Also WM8233 can implement channel identification data instead of trigger data. Table 11 shows the

matrix of input channel and channel ID.

ID[2]

ID[1]

ID[0]

IN1

IN2

IN3

IN4

IN5

IN6

Table 11 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]

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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