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부품번호 | KS2508 기능 |
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기능 | OSD PROCESSOR FOR MONITOR | ||
제조업체 | Samsung semiconductor | ||
로고 | |||
KS2508
Preliminary
OSD PROCESSOR FOR MONITOR
OVERVIEW
The KS2508 is used to display some characters or symbols on
a screen of monitor. Basically, the operation is to control the
internal memory on chip and generate the R,G,B signals for
some characters or symbols. The R,G,B signals are synchro-
nized with the horizontal sync. Then the R,G,B signals are
mixed with the main video signal in the Video Amp IC.
The font data for characters or symbols are stored in the inter-
nal ROM. This stored data are accessed and controlled by the
control data from a micro controller. The control data are trans-
mitted through the I2C bus. All timing control signals including
the system clock are synchronized with the horizontal sync.
Therefore there is a PLL circuitry on chip.
16-DIP-300
FEATURES
• 256 ROM fonts (Each font consists of 12 x 18 dots.)
• Full Screen Memory Architecture
• Wide range PLL available (15 kHz ~ 120 kHz)
• Programmable vertical height of character
• Programmable vertical and horizontal positioning
• Character color selection up to 16 different colors
• Programmable background color (Up to 16 colors)
• Character blinking, bordering and shadowing
• Color blinking
• Character scrolling
• Fade-in and fade-out
• Box drawing
• Character sizing up to four times
• 96 MHz pixel frequency from on-chip PLL
• IIC Protocol Data Transmission (Slave Address : BAH)
ORDERING INFORMATION
Device Package Operating Temperature
KS2508 16-DIP-300
0°C ~ 70°C
1
KS2508
Preliminary
OSD PROCESSOR FOR MONITOR
PIN DESCRIPTIONS
Table 1. Pin Descriptions
Pin No.
1
2
Signal
VSS_A
VCO_IN
3 VREF1
4 VDD_A
5 VREF
6 HFLB
7 SDA
8 SCL
9 VFLB
10 VSS_D
11 FBLK
12 B_OUT
13 G_OUT
14 R_OUT
15 INT
16 VDD_D
Active
-
-
-
-
-
Low
-
-
Low
-
-
-
-
-
-
-
I/O
-
Input
Input
-
Input
Input
In/Out
In/Out
Input
-
Output
Output
Output
Output
Output
-
Description
Ground (Analog Part)
This voltage is generated at the external loop filter and
goes into the input stage of the VCO.
1.26 V DC Voltage from the Bandgap Reference.
Connected to ground through a resistor to make internal
reference current (Typical 36 KΩ for 27µA)
+5 V Supply Voltage for Analog Part
Bandgap Reference Voltage (Typical 1.26 V)
Horizontal Flyback Signal
Serial Data (I2C)
Serial Clock (I2C)
Vertical Flyback Signal
Ground for Digital Part
Fast Blank Signal
Video Signal Output (B)
Video Signal Output (G)
Video Signal Output (R)
Intensity Signal Output
+5 V SUpply Voltage for Dogital Part
4
4페이지 KS2508
Preliminary
OSD PROCESSOR FOR MONITOR
FUNCTIONAL DESCRIPTIONS
Data Transmission to the KS2508
According to the I2C protocol, the KS2508 receives the data from a micro controller. The SDA line and the SCL line
are shown in Figure 4. As shown in Figure 4, after the starting pulse, the slave address with R/W* bit and an
acknowledge are transmitted in sequence, an internal register address of the KS2508 is followed. The first 8-bit
byte is the upper 8bits of the register address. The lower 8bits of the register address are followed after the second
acknowledge. There is a data transmission format and are two address bit patterns in the KS2508 as following.
The slave address of the KS2508 is BAH(in hexadecimal).
Data Transmission Format
Row Address -> Column Address -> Data Byte N -> Data Byte N+1 -> Data Byte N+2 -> ....
Address Bit Pattern for Display Registers Data
(a) Row Address Bit Pattern
R3 - R0: Valid Data for Row Address
A15 A14 A13 A12 A11 A10
A9
A8
X X X X R3 R2 R1 R0
(b) Column Address Bit Pattern
C4 - C0: Valid Data for Column Address
A7 A6 A5 A4 A3 A2
X X X C4 C3 C2
A1
C1
A0
C0
After addressing, data bytes are followed as the above data transmission format. The Figure 4 describes the data
transmission with the I2C bus protocol.
SCL
SDA
START
IIC SLAVE ADDRESS
R/W A15 A14 A13 A12 A11 A10 A9 A8
A7 A6 A5 A4 A3 A2 A1 A0
ACK
MSB ADDRESS
ACK
LSB ADDRESS
ACK
SCL
...
SDA D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
DATA BYTE N(MSB DATA)
ACK
DATA BYTE N(LSB DATA)
ACK
DATA BYTE N(MSB DATA)
ACK ... STOP
Figure 4. SDA line and SCL line (Write Operation)
7
7페이지 | |||
구 성 | 총 22 페이지수 | ||
다운로드 | [ KS2508.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
KS2501 | OSD PROCESSOR FOR MONITORS | Samsung semiconductor |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |