tda933xh NXP Semiconductors, tda933xh Datasheet - Page 10

• Manufacturer Part Number: tda933xh
• Description: Tda933xh Series I2c-bus Controlled Tv Display Processors
• Manufacturer: NXP Semiconductors

Philips Semiconductors
The minimum value for the vertical wait setting is 8 line
periods. If the setting is lower than 8, the wait period will
remain at 8 line periods.
The E-W drive circuit has a single-ended output. The E-W
geometry can be adjusted on the following parameters:
The IC has an EHT compensation input which controls
both the vertical and the E-W output signals. The relative
control effect on both outputs can be adjusted via the
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correction variable).
To avoid damage to the picture tube in the event of missing
or malfunctioning vertical deflection, a vertical guard
function is available at the sandcastle pin (pin SCO). The
vertical guard pulse from the vertical output stage
(TDA835x) should be connected to the sandcastle pin,
which acts as a current sense input. If the guard pulse is
missing or lasts too long, bit NDF is set in the status
register and the RGB outputs are blanked.
2002 Jun 04
2
C-bus (sensitivity of vertical correction is fixed; E-W
Horizontal width with increased range because of the
‘zoom’ feature
E-W parabola/width ratio
E-W upper corner/parabola ratio
E-W lower corner/parabola ratio
E-W trapezium.
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2
C-bus controlled TV display processors
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If the guard function is disabled via bit EVG, only status
bit NDF is set.
The IC also has inputs for flash and overvoltage protection.
More details about these functions are given in Chapter
“Characteristics”; note 43.
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The slave address of the IC is given in Table 1. The circuit
operates up to clock frequencies of 400 kHz. Valid
subaddresses: 00 to 1F, subaddress FE is reserved for
test purposes. The auto-increment mode is available for
subaddresses. It should be noted that the status bytes
cannot be addressed separately, they can only be read via
the auto-increment mode.
Table 1 Slave address (8C)
2
C-BUS SPECIFICATION
A6
1
A5
0
A4
0
A3
0
TDA933xH series
A2
1
Preliminary specification
A1
1
A0
0
R/W
1/0