Daewoo DTJ - 28A6F Service Manual download pdf (Page 16)

(4) PIN DESCRIPTION

Figure 2. Pin Description

IC description

RESET Reset (input, active low). The ST9+ is initialised

by the Reset signal. With the deactivation of RESET,

program execution begins from the Program memory

location pointed to by the vector contained in program

memory locations 00h and 01h.

R/G/B Red/Green/Blue. Video color analog DAC out-

puts

FB Fast Blanking. Video analog DAC output.

VOD Main power supply voltage(5V 10%, digital)

WSCF, WSCR Analog pins for the VPS/WPP slicer line

PLL.

MCFM Analog pin for the display pixel frequency multi-

plier.

OSCIN, OSCOUT Oscillator (input and output).

These pins connect a parallel-resonant crystal(24MHz

maximum), or an external source to the on-chip clock

oscillator and buffer. OSCIN is the input of the oscilltor

inverter and internal clock generator; OSCOUT is the

output of the oscillator inverter.

VSYNC Vertical Sync. Vertical video synchronisation

input to OSD. Positive or negative polarity.

HYNC/CSYNC Horizontal/Composite sync. Horizontal

or composite video synchronisation input to OSD. Posi-

tive or negativety.

PXFM Analog pin for the Display Pixel Frequency Multi-

plier

AVDD Analog VDD of PLL. This pin must be tied to

VDD externally to the ST92195.

GND Digital circuit ground.

AGND Analog circuit ground(must be tied externally to

digital GND).

CVBS1 Composite video input signal for the Teletext

slicer and sync extraction.

CVBS2 Composite video input signal for the VPS/WSS

slicer. Pin AC coupled.

AVDD1, AVDD2 Analog power supplies(must be tied

externally to AVDD).

TXCF Analog pin for the VPS/WSS line PLL.

CVBSO, JTDO, JTCK Test pins : leave floating.

JTMS, TEST0 Test pins : must be tied to AVDD2.

JTRST0 Test pin : must be tied to GND.

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Daewoo DTJ - 28A6F Service Manual Page 16

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