Casio QT-6000 Service Manual page 74

PIN NAME I/O
CRT Interface
RED O Analog Red Current Output
GREEN O Analog Green Current Output
BLUE O Analog Blue Current Output
IREF I Current Reference Input
CRTVSYNCC O CRT Vertical Sync
CRTHSYNC/ CRT Horizontal Sync or Composite Sync depending on CCR65 [0]
CSYNC O 0 = CRT Horizontal Sync
1 = Composite Sync
Video Port Interface
P [15:0] I/O RGB or YUV input/ RGB digital output
PCLK I/O Pixel Clock
VREF I/O VSYNC input from PC Card or video decoder
HREF I/O HSYNC input from PC Card or video decoder
BLANK/ Blank output or TVCLK output depending on CCR69 bit 7.
TVCLK 0 = BLANK output
I/O 1 = TVCLK output
TVCLK output is used to drive external NTSC/PAL TV encoder. To select NTSC or PAL TV, please refer to
CCR65 register
General Purpose Registers / I2C
USR3 General Purpose register. It is recommended to use USR3 to control TV On/Off.
I/O 0 = TV display is OFF
1 = TV display is ON
USR2 General Purpose register. It is recommended to use USR2 to select NTSC/PAL TV settings.
I/O 0 = PALTVCLK
1 = NTSCTVCLK or REFCLK
USR1 / SDA I/O General Purpose register. USR1/ DDC2/ I2C Data. Can be used to select different test modes.
USR0 / SCL I/O General Purpose register. USR0/ DDC2/ I2C Clock. Can be used to select different test modes.
Tes t Mode Pi ns
TEST [1:0] I Test mode selects
DESCRIPTION
— 72 —