tda9984a NXP Semiconductors, tda9984a Datasheet - Page 25

• Manufacturer Part Number: tda9984a
• Description: Hdmi 1.3 Transmitter With 1080p Upscaler Embedded
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA9984A_4
Product data sheet
8.4.3 Pixel repetition
8.5.1 Clock management
8.5 Control blocks
To transmit video formats with pixel rates below 25 mega samples per second or to
increase the number of audio sample packets in each frame, the TDA9984A uses pixel
repetition to increase the number of pixels sent by the frame. The pixel clock is multiplied
by the same factor as given in
Table 16.
The system clock is composed of a series of three PLLs, which will generates different
clocks in the system taking into account the double edge, the scaling ratio and the
serialization.
PR[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
Others
Fig 15. TMDS single-ended output swing as a function of external resistor R
(1) Swing character data
(2) Upper limit (600 mV)
(3) Lower limit (400 mV)
V
(mV)
o(se)
650
550
450
350
500
Pixel repetition
(1)
(2)
(3)
Pixel repetition factor
no repetition: pixel sent once
2 times: pixel repeated once
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times
reserved
Rev. 04 — 15 January 2009
Table
600
HDMI 1.3 transmitter with 1080p upscaler embedded
16.
700
R
EXT_SWING
TDA9984A
( )
001aag602
© NXP B.V. 2009. All rights reserved.
EXT_SWING
800
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