ADE3700XT datasheet(72/89 Pages) STMICROELECTRONICS

72 / 89 page

Output Multiplexer

ADE3700

72/89

2.19

Output Multiplexer

The Output Multiplexer formats the single wide data stream from the output of the APC block into a

single or double wide data path for the flat panel. The architecture is shown in Figure 10.

Latency is not important, as long as the timing relationship between hsync, vsync, enab and data is

preserved at the output. In Double Wide mode, the first pixel must be properly aligned even if the

number of pixels in blanking or active are odd. The divide-by-2 circuit can be set to resync per line

(based on data_enab and hsync_in edge) and per frame (based on vsync_in edge). The most

reliable timing is when hsync and vsync are in the “low” counts of the timing core counters (i.e.

hsync_set and hsync_rst are both below the active data region start/end counts). In the event that

hsync and vsync are in the “high” (after active region) counts, the device should be set to sync to

data_enab_re.

The Per Pin Delay and RSDS logic occur after the last latch and are implemented on all channels to

maintain delay balance between signals that go into RSDS mode (data and clk/hsync) and those

that do not (de/vsync and tcon).

Figure 10: Output Mux Block Diagram

Right

Shift

Byte

Flip

Red &

Blue

Swap

Right

Shift

Byte

Flip

Right

Shift

Byte

Flip

rin[7:0]

gin[7:0]

bin[7:0]

Single to

Double Wide

Converter

Data

Inversion

RSDS Logic and Per Pin Delay

FLOPS

Output Mux/Reg

rda[7:0]

gda[7:0]

bda[7:0]

rdb[7:0]

gdb[7:0]

bdb[7:0]

inv_a

inv_b

hclk

enab_in

hsync_in

vsync_in

tcon_in[13:0]

pwm_a_in

pwm_b_in

tci[13:0]

tcon_out[7:0]

routa[7:0]

gouta[7:0]

bouta[7:0]

routb[7:0]

goutb[7:0]

boutb[7:0]

enab_out

hsync_out

vsync_out

clk_out

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