TDA9330 Philips Semiconductors, TDA9330 Datasheet - Page 34

• Manufacturer Part Number: TDA9330
• Description: I2C-bus controlled TV display processors
• Manufacturer: Philips Semiconductors

Philips Semiconductors
45. The vertical scroll function is active only in the expand mode of the vertical zoom, i.e. at a DAC position larger
46. With the vertical wait function, the start of the vertical scan can be delayed with respect to the incoming vertical sync
47. In the TDA9330H and TDA9332H, the DAC output is I
Table 54 Operation of the vertical wait function
2000 May 08
1f
2f
2f
1f
2f
I
H
H
H
H
H
2
nominal scan. At an amplitude of 1.05 times the nominal scan, the output current is limited and the blanking of the
RGB outputs is activated, see Fig.14. In addition to the variation of the vertical amplitude, the picture can be vertically
shifted on the screen via the ‘scroll’ function. The nominal scan height must be adjusted at a position of 19H (25 DEC)
of the vertical ‘zoom’ DAC and 1FH (31 DEC) for the vertical ‘scroll’ DAC.
than 10H (16 DEC).
pulse. The operation is different for the various scan modes, see Table 54 and Figs 12 and 13. The minimum value
for the vertical wait is 8 line periods. If the setting is lower than 8, the wait period will remain 8 line periods.
is proportional to the centre frequency of the line-oscillator. In TV mode, the output voltage will always be at the
minimum value. In VGA mode, the output is at the minimum value for the lowest centre frequency (32 kHz) and at
the maximum value for the highest centre frequency (48 kHz). The output impedance of the DAC output depends on
the output voltage. The output consists of an emitter follower with an internal resistor of 50 k to ground.
; TV mode
; TV mode; VSR = 0
; TV mode; VSR = 1
; multi sync mode
; multi sync mode
C-bus controlled TV display processors
MODE
2
34
C-bus controlled. In the TDA9331H, the DAC output voltage
fixed; see Fig.12
end of V
start of V
start of V
start of V
D
D
D
D
plus vertical wait setting
plus vertical wait setting
plus vertical wait setting
plus vertical wait setting
START OF VERTICAL SCAN
TDA933xH series
Preliminary specification