Gopel Electronic basicCON 4115, Руководство пользователя

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Hardware
2-6 basicCON 4115 – User Manual
FRONT
PORCH
BACK
PORCH
RGB
H_TOTAL/V_TOTAL
HSYNC
VSYNC
ENABLE
RGB/
CNTRL
SYNC
WIDTH
BLANK_WIDTH
H&V H&V H&V
H&V
Figure 2-5: Display Timings 2
Signal Default Unit max. Remarks
1
H_TOTAL
1056 clocks 2000
2
H_BLANK_WIDTH
256 clocks 1000 Time for the control data
transmission (must be greater than
H_FRONT_PORCH + H_SYNC_WIDTH )
3
H_SYNC_WIDTH
128 clocks 998
4
H_FRONT_PORCH
40 clocks 998
5
V_TOTAL
521 lines 2000
6
V_BLANK_WIDTH
41 lines 1000 Must be greater than
V_FRONT_PORCH + V_SYNC_WIDTH
7
V_SYNC_WIDTH
2 lines 998
8
V_FRONT_PORCH
9 lines 998
9
Pixel clock frequency
33.00 MHz 33 Three available frequencies:
14 MHz
20 MHz
33 MHz
Table 1: Input parameters
H_ACTIVE results from H_TOTAL – H_BLANK_WIDTH
V_ACTIVE results from V_TOTAL – V_BLANK_WIDTH
H_BACK_PORCH
results from
H_BLANK_WIDTH – H_FRONT_PORCH – H_SYNC_WIDTH
V_BACK_PORCH results from
V_BLANK_WIDTH
–
V_FRONT_PORCH
–
V_SYNC_WIDTH
Only during the
H_BLANK_WIDTH
time control data is sampled.
That means, that H_FRONT_PORCH + H_SYNC_WIDTH must be less
than H_BLANK_WIDTH .
V_ BLANK_WIDTH
must be greater than
V_FRONT_PORCH
+
V_SYNC_WIDTH
otherwise the image is read wrongly from the memory.