5. AUDIO AMPLIFIER STAGE WITH TPA3002D2
The TPA3002D2 is a 9-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied stereo
speakers. The TPA3002D2 can drive stereo speakers as low as 8
. The high efficiency of the
TPA3002D2 eliminates the need for external heatsinks when playing music.
6. POWER
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient
design of a step-down switching regulator (buck converter). All circuits of this series are capable of driving
a 3.0A load with excellent line and load regulation. Two different versions (one having a fixed output
voltage of 3.3 V, and one with 5.0 V) of this IC are used in the regulator board.
7. MICROCONTROLLER SDA55XX
7.1. General Features
? Feature selection via special function register
? Simultaneous reception of TTX, VPS, PDC, and WSS (line 23)
? Supply Voltage 2.5 and 3.3 V
? ROM version is used.
7.2. External Crystal and Programmable Clock Speed
? Single external 6MHz crystal, all necessary clocks are generated internally
? CPU clock speed selectable via special function registers.
? Normal Mode 33.33 MHz CPU clock, Power Save mode 8.33 MHz
7.3. Microcontroller Features
? 8bit 8051 instruction set compatible CPU.
? 33.33-MHz internal clock (max.)
? 0.360 ms (min.) instruction cycle
? Two 16-bit timers
? Watchdog timer
? Capture compare timer for infrared remote control decoding
? Pulse width modulation unit (2 channels 14 bit, 6 channels 8 bit)
? ADC (4 channels, 8 bit)
? UART (rxd, txd)
7.4. Memory
? Up to 128 Kilobyte on Chip Program ROM
? Eight 16-bit data pointer registers (DPTR)
? 256-bytes on-chip Processor Internal RAM (IRAM)
? 128bytes extended stack memory.
? Display RAM and TXT/VPS/PDC/WSS-Acquisition-Buffer directly accessible via MOVX
? UP to 16KByte on Chip Extended RAM (XRAM) consisting of;
- 1 Kilobyte on-chip ACQ-buffer-RAM (access via MOVX)
- 1 Kilobyte on-chip extended-RAM (XRAM, access via MOVX) for user software
- 3-Kilobyte Display Memory
7.5. Display Features
? ROM Character set supports all East and West European Languages in single device
? Mosaic Graphic Character Set
? Parallel Display Attributes
? Single/Double Width/Height of Characters
? Variable Flash Rate
? Programmable Screen Size (25 Rows x 33...64 Columns)
? Flexible Character Matrixes (HxV) 12 x 9...16
? Up to 256 Dynamical Redefinable Characters in standard mode; 1024 Dynamical Redefinable Characters
in Enhanced Mode
? CLUT with up to 4096 colour combinations
? Up to 16 Colours per DRCS Character
? One out of 8 Colours for Foreground and Background Colours for 1-bit DRCS and ROM Characters
2
20? TFT TV Service Manual 08/09/2005 |
ACEC
