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BIT1612 10-Bit Digital Video Decoder with OSD and T-CON
79
7.2 Master Mode – Script MCU
BIT1612 內建 Script MCU，可提供使用者將程式碼儲存在 Serial EEPROM 中，BIT1612 將會依據使用者所
撰寫的程式碼內容，解碼後執行其相對的指令，目前僅支援 24 系列 (24C02~24C64) 的 Serial EEPROM。而執
行速度則依據於 TWSI 速度而定，透過設定 R_SERIAL_CKEN_SEL (0x138[2:0]) 可調整 TWSI 速度，從 98KHz
~ 384KHz，參考設定如下表。
Table 7-2 TWSI Speed
R_XCLK_SEL
OSC/1 OSC/2 OSC/4
R_SERIAL_CKEN_SEL=0 97KHz 48KHz 24KHz
R_SERIAL_CKEN_SEL=1 189KHz 95KHz 47KHz
R_SERIAL_CKEN_SEL=2 372KHz 186KHz 93KHz
R_SERIAL_CKEN_SEL=3 585KHz 292KHz 146KHz
R_SERIAL_CKEN_SEL=4 614KHz 307KHz 153KHz
R_SERIAL_CKEN_SEL=5 768KHz 384KHz 192KHz
R_SERIAL_CKEN_SEL=6 945KHz 472KHz 236KHz
R_SERIAL_CKEN_SEL=7 x 558KHz 279KHz
7.2.1 Architecture
BIT1612 內建之Script Control內含 4 個Internal Registers (A_REG、B_REG、C_REG、Z_REG) 及
5 組Internal Address Index (PC、EADDR、RADDR、IADDR、R_REG_ADDR)，32 Bytes Internal RAM
(0x700~0x71F)，BIT1612 指令集對EEPROM只能定址到 2KB，但可以運用R_EEPROM_BANK_SEL切換
EEPROM BANK方式擴増，最多可以定址到 64KB。相關Registers如
Table 7-3 所示，所有的算數及邏輯
運算皆在A_REG及B_REG內進行。
Table 7-3 Register and Address Index
Register and Address Index Address R/W Bits Memo
A_REG 0x13F[7:0] R 8 Operand A Register
B_REG 0x140[7:0] R 8 Operand B Register
C_REG 0x13E[6] R 1 Carry Flag Register
Z_REG 0x13E[5] R 1 Zero Flag Register
PC - - 11 Program Counter
EADDE - - 11 EEPROM Address
RADDR - - 11 Internal Register Setting Address
IADDR - - 8
TWSI Address
Device Address <= R_TWSI_SLAVE
REG Address <= Instruction Byte 2
R_REG_ADDR 0x137[2:0],0x136[7:0] RW 11
ADDR Register (Shared)
FILLR
JMPR
TABLE
R_REG_NUM 0x134[7:0] RW 8
NUM Register (Shared)
FILLR
R_REG_CNT 0x135[7:0] RW 8
Count Register (Shared)
FILLR
R_SERIAL_CKEN_SEL 0x138[2:0] RW 3
TWSI SCL SPEED
98KHz ~ 384KHz
(111: Fastest; 000: Lowest)
Second EEPROM Enable
0: Single EEPROM
R_SECOND_EEPROM 0x138[3] RW 1
1: Dual EEPROM
R_EEPROM_BANK_SEL 0x137[7:3] RW 5 EEPROM Bank Selection
R_PG_EN 0x138[4] RW 1 Power Good Function Enable
Power Monitor Input Inverse
0: Low active
R_PG_POL 0x138[5] RW 1
1: High active
- BIT1612 1
- Content 2
- 1 General Description 11
- 2 Features 11
- 3 Order Information 13
- 4 Block Diagram 13
- 5 Pin Definition 14
- 6 Functional Description 18
- 6.4 Pad Type Setup 22
- 6.6 System Enable and Reset 23
- 6.7 Clock Domain Systems 24
- Panel Active Window 26
- Blank Range 26
- HSYNC Output 26
- VSYNC Output 26
- 6.9 Output Data Path 27
- 6.10 Special Output Setup 28
- Input VSYNC 29
- Output VSYNC 29
- 6.12 TCON Function 30
- 6.15 Background 2 33
- 6.17 Auto Blank Screen 34
- Input Image Window 35
- HSYNC Input 35
- VSYNC Input 35
- (Internal VD) 36
- R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 37
- G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 37
- B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 37
- 6.20.7 RGB565 38
- 6.21 Input Mode Selection 39
- Background 41
- 6.24 Scaling Engine 42
- 6.25 Timing Adjustment 45
- Pre-Image Enhancement 46
- Post-Image Enhancement 46
- 6.26.3 Sharpness Process 47
- 6.26.7 LUT Gamma Correction 48
- 6.26.8 Dither 48
- Factor 0x80 49
- 6.27 PWM Function 50
- R_PWM_REF 51
- Base on panel clock 51
- R_PWM_FREQ 51
- R_PWM_DUTY 51
- Base on reference clock 51
- 6.28.5 VBI Data Slicer 55
- 6.28.6 Source Detection 55
- 6.28.7 Luminance Process 56
- 6.28.8 Chroma Process 57
- 6.28.9 Comb Filter Process 58
- 6.28.10 AGC and ACC Process 60
- 6.28.11 AFE and PLL Control 63
- 6.30 Serial RGB Output 68
- 6.31 BIT1690 Interface 68
- 6.32 OSD Function 69
- 6.32.2 OSD Memory Mapping 70
- R_Wx_INDEXS 71
- R_Wx_INDEXE 71
- R_BANK_SEL = 000 72
- If Display RAM 72
- {0x503[4],0x403[6:0]} = 72
- {0x501[4],0x401[6:0]} 73
- R_Wx_INDEX_S 76
- R_OSD_LAYER[2:0] = 001 77
- 6.32.7 OSD Clock Control 79
- 6.33 Timer 80
- 6.34 IR Decoder Function 81
- 6.35 GPI and KEY Function 82
- 6.36 PLL and OSC Pads 82
- 6.37 Auto Detection 83
- 01: From VSYNC1 Pin 85
- 10: From HSYNC2 Pin 85
- 11: From VSYNC2 Pin 85
- 7 User Interface 86
- 7.2.1 Architecture 89
- 7.2.2 Instruction Set 91
- 7.2.3 Start and Interrupt 94
- 7.2.6 Watch Dog Timer 95
- 7.2.8 TWSI Write/Read 96
- 7.2.9 SPI Interface 96
- 7.2.10 Debug Mode 96
- 7.3 Slave Mode 97
- 7.3.2 TWSI Protocol 98
- From Pin 104 Setting 100
- From Pin 105 Setting 100
- 8 Timing Diagram 101
- 9 Electrical Characteristic 103
- 10 Soldering Information 104
- 11 Package Information 105
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