WP
This pin must be connected to either VSS or VCC. If tied to VSS, normal memory operation is enabled
(read/write the entire memory 000 -FFF). If tied to VCC, WRITE operations are inhibited. The entire
memory will be write -protected. Read operations are not affected.
WCC
+2.5V to 6V Power Supply
WSS
Ground
14.4.SDA5275
14.4.1.Features
? Single chip teletext IC
? Analog CVBS-input with onchip clamping circuitry
? Slicer
? Supports level 1, 2.5 and 3.5 ETSI teletext standard
? Stores up to 14 teletext pages on chip
? Stores up to 2048 teletext pages with external 16 M memory
? SDA 5275: full level 2.5 processing
? Analog RGB-output
? 41 Latin script languages
? 12 ´ 10 character size
? Parallel display attributes
? 64 from 4096 colors selectable
? Enhanced flash modes
? Dynamically redefinable charac ter set (DRCS, PCS)
? Pixel graphics
? Full screen display (64 ´ 32 or 80 ´ 24 character positions)
? Horizontal and vertical scrolling
? Graphic cursors
? 4:3 and 16:9 display
? Multinorm display (50/60/100/120 Hz)
? RISC-processor
? Firmware downloadable
2
? IC / 3 wire UART -interface (1 Mbit/s)
? Independent clocks for acquisition and display
? Tools for greatly simplified software development
? 24-Kbyte on-chip reconfigurable DRAM
? 44160-bit character ROM
? One external crystal for all standards
14.4.2.Pin Definition and functions
Pin No. P-LCC-68-1 Symbol Function
1 INTQ Interrupt request output to ext. controller
2 CLK-IO System clock input/output
3 TCSQ/FLD Composite sync output/ field output
4 VS/VCS Vertical sync input/output
5 HS Horizontal sync input/output
6 XOUT 20.5-MHz crystal oscillator output
7 XIN 20.5-MHz crystal oscillator input
8 GPO General purpose output
9 TM Test pin, leave open or connect VSS
10 CVBS CVBS-video signal input
11 VDD1 + 5 V digital supply
12 VDDA + 5 V analog supply
13 VSSA1 Analog ground
14 N.C. Not connected
15 N.C. Not connected
16 VDD2 + 5 V digital supply
17 RES Chip reset
18 N.C. Not connected
8 |
ACEC
TOSHIBA
