Philips DVDR725H, Руководство по обслуживанию

Страница: 190 / 211

Circuit-, IC descriptions and list of abbreviations
EN 190 HDRW720/0x, DVDR725H/0x 9.
Pin Name Pin Number I/O Function
VSI 167 IV sync input
CSO 165 Oc omposite sync output
HSO 164 OH sync output
VSO 163 OV sync output
BLEND9 3O Alpha Blending Switch
OSD/TV 94 OO SD / TV Switch
OSD/PIP9 5O OSD / PIP Switch
BKP 162 OB ack Porch signal for external clamping circuit
GEN/LOCK 161 OG EN / LOCK PLL mode indicator
I
2
C bus contro l
MSCL6 6 I/O Master IIC Bus Clock
MSDA6 7 I/O Master IIC Bus Data
SSCL 160 I/O Slave IIC Bus Clock
SSDA 159 I/O Slave IIC Bus Data
Infra-Red interface
IRIN 70 II R code input
IROUT 158 OI R code output
Miscellaneous
OUTP0/HTST 68 O Programmable output port 0 / H sync Test output
OUTP1/VBID6 9O Programmable output port 1 / VBI Data test output
GCLR 61 IG lobal Clear
Oscillation
XTAL19 I
Connect to an 36MHze xternal resonator. When in external
clock input mode, an external clock is input via this pin.
XTAL21 0O
Connect to an 36MHze xternal resonator. When in external
clock input mode, this pin is left open.
Analog Signals
R/YOUT 85 O Red or Y Output
G/UOUT8 7O Green or U Output
B/VOUT 89 OB lue or V Output
CVBS 189 I Composite Video Base-band Signal
Pin Name Pin Number Function
Power
DVDD 31, 171 3.3V power supply for digital portion of internal hybrid circuit
DGND 37, 195 0V ground reference for digital portion of internal hybrid circuit
AVDD 33, 81, 83, 172, 174 3.3V power supply for analog portion of internal hybrid circuit
AGND 35, 90, 91, 193, 194
0V ground reference for analog portion of internal hybrid
circuit