HMP8115CN Просмотр технического описания (PDF) - Intersil
Номер в каталоге
Компоненты Описание
производитель
HMP8115CN Datasheet PDF : 43 Pages
| |||
HMP8115
LINE #
621
622
623
624
625
1
2
3
4
5
6
7
VIDEO
INPUT
HSYNC
VSYNC
FIELD
‘EVEN’ FIELD
‘ODD’ FIELD
NOTE:
5. The trailing edge of VSYNC is 5±1 clocks after the trailing edge of HSYNC is to be VMI compatible and to indicate a transition to an odd field.
FIGURE 7. PAL(B,D,G,H,I,N,NC) HSYNC, VSYNC AND FIELD TIMING DURING AN EVEN TO ODD FIELD TRANSITION
LINE #
309
310
311
312
313
314
315
316
317
318
319
320
VIDEO
INPUT
HSYNC
VSYNC
FIELD
‘ODD’ FIELD
‘EVEN’ FIELD
NOTE:
6. The trailing edge of VSYNC is 5±1 clocks after the leading edge of HSYNC to be VMI compatible and to indicate a transition to an even field.
FIGURE 8. PAL(B,D,G,H,I,N,NC) HSYNC, VSYNC AND FIELD TIMING DURING AN ODD TO EVEN FIELD TRANSITION
BLANK AND DVALID TIMING
DVALID is asserted when P15-P0 contain valid data. The
timing and behavior of DVALID is dependent on the output
video format and the programmed values for bit 4
(DVLD_DCYC) and bit 5 (DVLD_LTC) of the GENLOCK
CONTROL register 04H. Refer to the specific output video
format sections that follow for the specific behavior for
DVALID.
BLANK is used to determine if the HMP8115 is generating
active video data. BLANK should be used in conjunction with
DVALID to capture digital data from the decoder. BLANK,
DVALID and the video data are output after the internal pipe-
line latency and synchronous with the rising edge of CLK2.
During active scan lines BLANK is negated when the hori-
zontal pixel count matches the value in the END H_BLANK
register 32H. A count of 00H corresponds to the 50% point of
the leading edge of the sync tip after leaving the part. BLANK
is asserted when the horizontal pixel count matches the value
in the START H_BLANK register 31H/30H. Note that horizon-
tally, BLANK is programmable with two pixel resolution.
START V_BLANK register 34H/33H and END V_BLANK reg-
ister 35H determine which scan lines are blanked for each
field. During inactive scan lines, BLANK is asserted during
the entire scan line. Half-line blanking of the output video
cannot be done. Reference Figure 9 for active video timing
and use Table 2 for typical blanking programming values.
TABLE 2. TYPICAL VALUES FOR HBLANK AND VBLANK REGISTERS
VIDEO STANDARD
(MSB/LSB)
ACTIVE TOTAL
PIXELS/ PIXELS/
LINE
LINE
LAST
PIXEL
COUNT
START
H_BLANK
(31H/30H)
END
H_BLANK
(32H)
START
V_BLANK
(34H/33H)
RECTANGULAR PIXELS
NTSC (M), PAL (M)
720
PAL (B, D, G, H, I,N, NC) 720
SQUARE PIXELS
858
857 (0359H)
842 (034AH)
122 (7AH)
259 (0103H)
864
863 (035FH)
852 (0354H)
132 (84H)
310 (0136H)
NTSC (M), PAL (M)
640
PAL (B, D, G, H, I,N, NC) 768
780
779 (030BH)
758 (02F6H)
118 (76H)
259 (0103H)
944
943 (03AFH) 922 (039AH)
154 (9AH)
310 (0136H)
END
V_BLANK
(35H)
19 (13H)
22 (16H)
19 (13H)
22 (16H)
10
Share Link: 