Hitachi 32LD8600, Руководство по обслуживанию

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TFT TV Service Manual
7. MICROCONTROLLER
The Micronas SDA 55xx TV microcontroller is dedicated to 8 bit applications for TV control and
provides dedicated graphic features designed for modern low class to mid range TV sets. The SDA
55xx provides also an integrated general purposefully 8051-compatible microcontroller with specific
hardware features especially suitable in TV sets. The microcontroller core has been enhanced to
provide powerful features such as memory banking, data pointers and additional interrupts, etc. The
internal XRAM consists of up to 16 kBytes. The microcontroller provides an internal ROM of up to 128
kBytes. ROMless versions can access up to 1 MByte of external RAM and ROM. The 8-bit
microcontroller runs at 33.33 MHz internal clock. SDA 55xx is realized in 0.25 micron technology with
2.5 V supply voltage for the core and 3.3 V for the I/O port pins to make them TTL compatible. Based
on the SDA 55xx microcontroller the MINTS software package was developed and provides dedicated
device drivers for many Micronas video & audio products and includes a full blown TV control SW for
the PEPER application chassis. The SDA 55xx is also supported with powerful design tools like
emulators from Hitex, Kleinhenz, iSystems, the Keil C51 Compiler and TEDIpro OSD development SW
by Tara Systems.
8. EEPROM 24C32
The Microchip Technology Inc. 24C32 is a 4Kx8 (32 Kbit) Electrically Erasable PROM. This device has
been developed for advanced, low power applications such as personal communications or data
acquisition. The 24C32 features an input cache for fast write loads with a capacity of eight 8-byte
pages, or 64 bytes. It also features a fixed 4K-bit block of ultra-high endurance memory for data that
changes frequently. The 24C32 is capable of both random and sequential reads up to the 32K
boundary. Functional address lines allow up to 8 - 24C32 devices on the same bus, for up to 256K bits
address space. Advanced CMOS technology makes this device ideal for low-power non-volatile code
and data applications.
9. CLASS AB STEREO HEADPHONE DRIVER TDA1308
The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package.
The device is fabricated in a 1 mm CMOS process and has been primarily developed for portable digital
audio applications.
10. SAW FILTERS
K9656M:
Standard:
• B/G
• D/K
• I
• L/L’
Features
• TV IF audio filter with two channels
• Channel 1 (L’) with one pass band for sound carriers at 40.40 MHz (L’) and 39.75 MHz (L’- NICAM)
• Channel 2 (B/G, D/K, L, I) with one pass band for sound carriers between 32.35 MHz and 33.40 MHz
Terminals
• Tinned CuFe alloy
Pin configuration
1 Input
2 Switching input
3 Chip carrier - ground
4 Output
5 Output
K3958M:
Standard:
• B/G
• D/K
• I
• L/L’