tda9955hl NXP Semiconductors, tda9955hl Datasheet - Page 27

• Manufacturer Part Number: tda9955hl
• Description: Triple 8-bit Analog-to-digital Video Converter For Hdtv
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 30.
Legend: * = default value
Table 31.
Legend: * = default value
[1]
TDA9955HL_1
Product data sheet
Address Register
A7h
A8h
A9h
Address Register
AAh
ABh
ACh
Fig 4.
If 0, HS signal corresponds with the horizontal sync internal signal.
Line and pixel counters
HREF_S_LSB
HREF_MSB
HREF_E_LSB
HS_S_LSB
HS_MSB
HS_E_LSB
Horizontal reference registers (address A7h to A9h) bit description
Horizontal reference registers (address AAh to ACh) bit description
iHS
line counter counts iHS
pulses modulo NLIN
line 1
pixel 1
Bit
7 to 0 HREF_START[7:0]
7 to 4 HREF_START[11:8] W
3 to 0 HREF_END[11:8]
7 to 0 HREF_END[7:0]
Bit
7 to 0 HS_START[7:0]
7 to 4 HS_START[11:8]
3 to 0 HS_END[11:8]
7 to 0 HS_END[7:0]
pixel counter counts CLKPIX pulses modulo NPIX
Symbol
Symbol
PXCNT_NPIX: [4:4095] pixels
Rev. 01 — 17 March 2008
Access Value Description
W
W
W
Access Value Description
W
W
W
W
Triple 8-bit analog-to-digital video converter for HDTV
PXCNT_PR
LCNT_PR
00h*
0h*
0h*
00h*
00h*
0h*
0h*
00h*
rising edge of iHS
loads the pixel counter with
the PXCNT_PR value
horizontal reference start: index of the first
active pixel, and also the position of the rising
edge of HREF signal and the position of SAV; if
null, HREF stays LOW and no SAV is inserted in
the data stream
horizontal reference end (LSB): index after the
last active pixel, and also the position of the
falling edge of HREF signal and the position of
EAV; if null, HREF falls at the beginning of a new
line and no EAV is inserted in the data stream
horizontal sync start: define the position of the
rising edge of the HS signal generated by the
timing generator
horizontal sync end: define the position of the
falling edge of the HS signal generated by the
timing generator
iVS
in case of interlaced signal,
line counter don’t care the
iVS of second field
rising edge of iVS
loads the line counter with
the LCNT_PR value
[1]
[1]
TDA9955HL
001aaa290
© NXP B.V. 2008. All rights reserved.
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