APPENDIX
IC DESCRIPTION
(4) Pin DescriptionThe vertical protection circuitry prevents the picture tube
from burn-in in the event of a malfunction of the vertical
Pin 1 - Supply Voltage, Output Pin Driver VSUPP*deflection stage. If the peak-to-peak value of the vertical
This pin is used as supply for the following digital output sawtooth signal is too small, the RGB output signals are
pins : FIFORRD, FIFORD, FIFOWR, FIFORWR.blanked.
Pin 2 - Ground, Output Pin Driver GNDP*Pin 12 - H-Drive Frequency Range Select FREQSEL
Output Pin Driver ReferenceThis pin selects the frequency range for the horizontal
drive signal.
Pin 3 - Sync Signal Input VS2
Additional pin for the vertical sync information. Via I CPin 13 - Clock Select 40.5 or 27/32 MHzCM12
Register the used vertical sync can be switched between Low level selects 27/32 MHz, High level selects 40.5 MHz
the inputs VS2 and VS(Pin 64)
Pin 14 - Clock Select 40.5 or 27/32 MHzCM0
Pin 4 - Reset for FIFO Read Counter FIFORRDLow level selects 27 MHz, High level selects 32 MHz
This signal is active-High and resets the read counter in
the display frequency doubling FIFO.Pin 15 - Range Switch2 for Measuring ADC RSW2
This pin is an open-drain pull-down output. During cutoff
Pin 5 - Read Enable for FIFO FIFORDmeasurement the switch is off. During white drive mea-
surement the switch is on. Also during the rest of time it is
This signal is active-High and enabels the read counter in on.
the display frequency doubling FIFO.
Pin 16 - Range Switch 1 or Second Input for Measuring
Pin 6 - Write Enable for FIFO FIFOWRADC RSW1
This signal is active-High and enables the write counter in This pin is an open-drain pull-down output. During cutoff
the display frequency doubling FIFO.and white-drive measurement, the switch is off. During
the rest of time it is on. The RSW1 pin can be used as
Pin 7 - Reset for FIFO Write Counter FIFOWRsecond measurement ADC input.
This signal is active-High and enables the write counter in Pin 17 - Measurement ADC Input SENSE
the display frequency doubling FIFO.
This is the input of the analog to digital converter for the
picture and tube measurement. Three measurement
Pin 8 - Horizontal Drive HOUTranges are selectable with RSW1 and RSW2
This open-drain output supplies the drive pulse for the hor-
izontal output stage. A pull-up resistor has to be used.Pin 18 - Measurement ADC Reference Input MGND
This is the ground reference for the measurement A/D
Pin 9 - Horizontal Flyback Input HFLBconverter.
Via this pin, the horizontal flyback pulse is supplied to the Pin 19 - Vertical Sawtooth Output VERT+(19)
DDP 3310B.
This pin supplies the drive signal for the vertical output
stage. The drive signal is generated with 15-bit precision.
Pin 10 - Safety Input SAFETYThe analog voltage is generated by a 4-bit current DAC
This input has two thresholds. A signal between the lower
with external resistor (6 k §Ů for proper operation) and
and upper threshold means normal function. Other signals uses digital noise-shaping.
are detected as malfunction.
Pin 20 - Vertical Sawtooth Output inverted VERT-
Pin 11 - Vertical Protection Input VPROTThis pin supplies the inverted signal of VERT+.
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ACEC
DAEWOO
