Casio QT 6000 Service Manual - Page 74

PIN NAME, DESCRIPTION, CRT Interface, Video Port Interface, General Purpose Registers / I2C, Tes t

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PIN NAME I/O CRT Interface RED O Analog Red Current Output DESCRIPTION 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/ TVCLK Blank output or TVCLK output depending on CCR69 bit 7. 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 - 72 -

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