TW8835
Order Information ............................................................................. 10
Functional Description ..................................................................... 11
Overview ................................................................................................... 11
Analog Front-end...................................................................................... 11
Video Decoder .......................................................................................... 11
Sync processor .................................................................................... 11
Color Decoding .................................................................................... 12
Automatic standard detection ........................................................... 12
Video Format support ......................................................................... 12
Touch Screen Controller .......................................................................... 13
Digital Input Support ................................................................................ 13
Input Image Control ................................................................................. 14
Image Scaling .......................................................................................... 14
Image Enhancement Processing ........................................................... 14
Black/White Stretch .......................................................................... 14
TFT Panel Support .................................................................................... 14
Dithering .............................................................................................. 14
Gamma Table ...................................................................................... 14
TCON .................................................................................................... 14
Font Based On Screen Display ................................................................ 15
On chip OSD functions ........................................................................ 15
Basic register setting flow example for Built-in OSD controller ....... 16
OSD Window Start Location: Built-in OSD controller ........................ 18
OSD_RAM Configuration .................................................................... 18
Alpha Blending for OSD Window........................................................ 19
Alpha Blending Concept ..................................................................... 19
SPI Flash On Screen Display ................................................................... 20
Built-in Microcontroller ....................................................................... 27
Microcontroller Interface ......................................................................... 29
Two Wire Serial Bus Interface ............................................................ 29
Pin Diagram .................................................................................... 32
Pin Description ............................................................................... 33
Parametric Information .................................................................... 39
AC/DC Electrical Parameters ................................................................. 39
Filter Curves ...................................................................................... 43
Anti-alias filter ...................................................................................... 43
Decimation filter.................................................................................. 43
Chroma Band Pass Filter Curves ....................................................... 44
Luma Notch Filter Curve for NTSC and PAL ....................................... 44
Chrominance Low-Pass Filter Curve .................................................. 45
128-pin LQFP Package Mechanical Drawing ................................. 46
TW8835 Register Summary .......................................................... 48
General ................................................................................................ 48
General ................................................................................................ 48
Input Control ........................................................................................ 48
MBIST (Memory Built-In Test)........................................................... 50
TSC (Touch Screen Control) ............................................................ 50
LOPOR/LEDC/DC-DC/VCOM Control ........................................... 51
SSPLL ................................................................................................. 52
Decoder ............................................................................................... 53
Decoder (Cont.) .................................................................................. 54
ADC/LLPLL......................................................................................... 55
SCALER / TCON ............................................................................... 56
Image Adjustment .............................................................................. 57
Gamma & Dither ................................................................................ 57
FOSD .................................................................................................. 58
SPI OSD ............................................................................................. 61
SPI & MCU ......................................................................................... 64
MEASUREMENT .............................................................................. 66
TW8835 Register Description ...................................................... 70
0x000 – Product ID Code Register (ID)........................................... 70
0x002 – IRQ ........................................................................................ 70
0x003 – IMASK .................................................................................. 70
0x004 – Status .................................................................................... 70
0x006 – SRST .................................................................................... 71
0x007 – OUTPUT CTRL I ................................................................. 71
0x008 – OUTPUT CTRL II ................................................................ 72
0x00F – INT0 WRITE PORT ............................................................ 72
0x01F – TEST .................................................................................... 72
0x040 – INPUT Control I.................................................................... 73
0x041 – INPUT Control II................................................................... 73
0x042 – INPUT CROP_HI ................................................................ 73
0x043 – INPUT V CROP Position .................................................... 73
0x044 – INPUT V CROP Length LO ............................................... 74
0x045 – IINPUT H CROP Position LO ............................................ 74
0x046 – INPUT H CROP Length LO ............................................... 74
0x047 – BT656 Decoder Control I .................................................... 74
0x048 – BT656 Decoder Control II ................................................... 74
0x049 – BT656 Status I ..................................................................... 74
0x04A – BT656 Status II .................................................................... 75
0x050 – DTV Input Control ................................................................ 76
0x051 – DTV Input Control ................................................................ 76
0x052 – DTV Input Control ................................................................ 77
0x053 – DTV Input Format ................................................................ 78
0x054 – DTV Field Detection Region ............................................... 78
0x056 – DTV Vsync Delay ................................................................ 79
0x057 – Sequential RGB ................................................................... 79
0x05F – Test Pattern Generator Control Register.......................... 80
0x080 – GPIO0_EN ........................................................................... 81
0x081 – GPIO1_EN ........................................................................... 81
0x082 – GPIO2_EN ........................................................................... 81
0x083 – GPIO3_EN ........................................................................... 81
0x084 – GPIO4_EN ........................................................................... 81
0x085 – GPIO5_EN ........................................................................... 81
0x086 – GPIO6_EN ........................................................................... 81
0x088 – GPIO0_OE .......................................................................... 81
0x089 – GPIO1_OE .......................................................................... 81
0x08A – GPIO2_OE .......................................................................... 81
0x08B – GPIO3_OE .......................................................................... 81
0x08C – GPIO4_OE .......................................................................... 82
0x08D – GPIO5_OE .......................................................................... 82
0x08E – GPIO6_OE .......................................................................... 82
0x090 – GPIO0_OD .......................................................................... 82
0x091 – GPIO1_OD .......................................................................... 82
0x092 – GPIO2_OD .......................................................................... 82
0x093 – GPIO3_OD .......................................................................... 82
0x094 – GPIO4_OD .......................................................................... 82
0x095 – GPIO5_OD .......................................................................... 82
0x096 – GPIO6_OD .......................................................................... 82
0x098 – GPIO0_ID ............................................................................ 83
0x099 – GPIO1_ID ............................................................................ 83
0x09A – GPIO2_ID ............................................................................ 83
0x09B – GPIO3_ID ............................................................................ 83
0x09C – GPIO4_ID ............................................................................ 83
0x09D – GPIO5_ID ............................................................................ 83
0x09E – GPIO6_ID ............................................................................ 83
0x0A0 – MBIST Control ..................................................................... 84
0x0A1 – MBIST I ................................................................................ 84
0x0A2 – MBIST II ............................................................................... 84
0x0A3 – MBIST III .............................................................................. 84
0x0A4 – MBIST IV ............................................................................. 84
0x0B0 – Touch Screen Control I ....................................................... 85
0x0B1 – Touch Screen Control II ...................................................... 85
0x0B2 – TSC ADC Data Output_HI ................................................. 86
0x0B3 – TSC ADC Data Output_LO ............................................... 86
0x0B4 – TSC ADC Sample and Clock ............................................ 86
0x0D4 – LOPOR Registers............................................................... 87
0x0D6 – TCLK AND PWM CNTL .................................................... 87
0x0D7 – FPWM3_LO ........................................................................ 87
0x0D8 – DPWM3 ............................................................................... 87
0x0D9 – FPWM4_LO ........................................................................ 87
0x0DA – DPWM4 .............................................................................. 87
0x0DB – FPWM_HI ........................................................................... 88
0x0DC – FPWM1_LO ....................................................................... 88
0x0DD – DPWM1 .............................................................................. 88
0x0DE – FPWM2_LO ....................................................................... 88
0x0DF – DPWM2 ............................................................................... 88
0x0E0 – LEDC Control I .................................................................... 89
0x0E1 – LEDC Sense Control .......................................................... 89
0x0E2 – LEDC Control II ................................................................... 89
0x0E3 – LEDC PWM ........................................................................ 90
0x0E4 – LEDC Dim Frequency ........................................................ 90
0x0E5 – LEDC Dim Control .............................................................. 90
0x0E6 – LEDC PWMTOP ................................................................ 90
0x0E8 – DCDC Control I ................................................................... 91
0x0E9 – DCDC Sense Control ......................................................... 91
0x0EA – DCDC Control II .................................................................. 92
0x0EB – DCDC PWM ....................................................................... 92
0x0EC – DCDC PWMTOP .............................................................. 92
0x0ED – VCOM-DC OFFSET Control ............................................ 92
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2013-03-14
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