TDA4857PS NXP Semiconductors, TDA4857PS Datasheet - Page 31

• Manufacturer Part Number: TDA4857PS
• Manufacturer: NXP Semiconductors

Specifications of TDA4857PS

• Lead Free Status / Rohs Status: Not Compliant

Philips Semiconductors
I
I
Notes
1. S = START condition.
2. SLAVE ADDRESS (MAD) = 1000 1100.
3. A = acknowledge, generated by the slave. No acknowledge, if the supply voltage is below 8.3 V for start-up and 8.1 V
4. SUBADDRESS (SAD).
5. DATA, if more than 1 byte of DATA is transmitted, then no auto-increment of the significant subaddress is performed.
6. P = STOP condition.
It should be noted that clock pulses according to the 400 kHz specification are accepted for 3.3 and 5 V applications
(reference level = 1.8 V). Default register values after power-up are random. All registers have to be preset via software
before the soft start is enabled.
Important: If the register contents are changed during the vertical scan, this might result in a visible interference on the
screen. The cause for this interference is the abrupt change in picture geometry which takes effect at random locations
within the visible picture.
To avoid this kind of interference, the adjustment of the critical geometry parameters HSIZE, HPOS, VSIZE and VPOS
should be synchronized with the vertical flyback. This should be done in such a way that the adjustment change takes
effect during the vertical blanking time (see Fig.18).
For very slow I
an I
2001 Apr 11
2
2
handbook, full pagewidth
C-BUS PROTOCOL
C-bus data format
I
PC monitors
2
2
S
for shut-down procedure.
C-bus message until the start of the vertical sync or vertical blanking.
C-bus autosync deflection controller for
(1)
blanking pulse
sync pulse
vertical
SLAVE ADDRESS
vertical
2
C-bus interfaces, it might be necessary to delay the transmission of the last byte (or only the last bit) of
SDA
Fig.18 Timing of the I
(2)
A
(3)
2
C-bus transmission for interference-free adjustment.
SUBADDRESS
31
(4)
A
(3)
parameter change takes effect
DATA
(5)
TDA4857PS
Product specification
A
(3)
MGM088
P
(6)