pnx8511 NXP Semiconductors, pnx8511 Datasheet - Page 52

• Manufacturer Part Number: pnx8511
• Description: Analog Companion Chip
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 29:
* indicates not present in secondary video channel
9397 750 12612
Product data
Bit
Offset 0x74 - TTXHL/TTXHD
7:4
3:0
Offset 0x75 - CSYNCA
7:3
2:0
Offset 0x76 - TTXOVS
7:0
Offset 0x77 - TTXOVE
7:0
Offset 0x78 - TTXEVS
7:0
Offset 0x79 - TTXEVE
7:0
Offset 0x7A - FAL (Vertical Active Size Adjustment)
7:0
Offset 0x7B - LAL (Vertical Active Size Adjustment)
7:0
Offset 0x7C - TTXCTRL
7
Symbol
TTXHL
TTXHD
CSYNCA
Unused
TTXOVS
TTXOVE
TTXEVS
TTXEVE
FAL
LAL
TTX60
PNX8510/11 video registers
Access Value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
…continued
0x5
0x2
0x0
-
0x5
0x16
0x4
0x16
0x24
0x29
0
Rev. 04 – 12 January 2004
Description
Length of TTXRQ window; only active at old TTX protocol
Note: bit TTXO = 1
Indicates the delay in clock cycles between rising edge of TTXRQ
output and valid data at pin TTX.
Advances composite sync against RGB output, adjustable from 0
XTAL clocks to 31 XTAL clocks
First line of occurrence of Teletext data in odd field
line = (TTXOVS + 4) for M-systems
line = (TTXOVE +1) for other systems
PAL: TTXOVS = 0x05
NTSC: TTXOVS = 0x06
Last line of occurrence of Teletext data in odd field
line = (TTXOVS + 3) for M-systems
line = TTXOVE for other systems
PAL: TTXOVS = 0x16
NTSC: TTXOVS = 0x10
First line of occurrence of Teletext data in even field
line = (TTXOVS + 4) for M-systems
line = (TTXOVE + 1) for other systems
PAL: TTXOVS = 0x04
NTSC: TTXOVS = 0x05
Last line of occurrence of Teletext data in even field
line = (TTXOVS + 3) for M-systems
line = TTXOVE for other systems
PAL: TTXOVS = 0x16
NTSC: TTXOVS = 0x10
Defines the video vertical position w.r.t vsync.
First active line = FAL+4 for M-systems and = FAL+1 for other 
systems. Measured in lines, FAL = 0 coincides with the first field
sync pulse.
Last active line = LAL+3 for M-systems and = FAL for other 
systems. Measured in lines, LAL = 0 coincides with the first field
sync pulse.
0 = Enables NABTS (FISE=1) or European TTX (FISE=0).
1 = Enables World Standard Teletext 60Hz (FISE=1).
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
PNX8510/11
Analog companion chip
52 of 92