The BU38603, BU38703 and BU38803 are Servo controller ICs for VCRs. They contain a high-speed, 8-bit CPU and perform the processing required for the drum, capstan, FV and PV completely in software, allowing a large reduction in the number of external components required. They also contain high-performance linear amplifiers, eliminating the need for interface ICs. Specialized hardware is included for items that require high-speed processing, to allow efficient utilization of the CPU.
Features 1) CPU 499 commands (69 types) Memory-mapped I / O Minimum command execution time: 250ns (8MHz) 2)ROM capacity BU38603: 16384 × 8 bit BU38703: 24576 × 8 bit BU38803: 32768 × 8 bit 3) RAM capacity: 512 × 8bit 4) Interrupt Pattern generator: 1 Watch-dog timer: 1 External interrupts: 1 FG interrupts: 5 Internal interrupts: 7 Two timers, serial transmission, interrupt, VHSW, CTL interval timer (fixed) / VISS * Multi-layer interrupts possible. 5) Free-running counter: 19 bit 6) PWM output: 12 bit × 2 7) Pattern generator 17 bits from FRC MSB used. Output Internal: 3 bit External (PO): 5 bit External (PIO): 6 bit 8) Programmable pre-scaler CFG: 7 bit CTL: 6 bit 9) Head amplifier / chroma rotary Generated from pattern generator output. 10) Built-in AGC. Five-bits used to switch the gain control registers for the CTL amplifier. 11) CTL counter: 1 / 30 or 1 / 25 12) Data shift PLL calculation: 24 bit 13) Timer: 8 bit × 2 14) Synchronous serial input/output: 8 bit × 1 15) VH PULSE V separeted from composite synchronous snal. Pseudo V generated from pattern generator output. Superimposed pseudo H synchronized with the composite synchronous signal. 16) VISS / VASS VASS 0 / 1 discrimination VISS discrimination threshold: 3 Aspect discrimination. D / A CTL switching. 17) Standard I / O Parallel I / O (PIO): 32 bit Parallel output (PO): 6 bit 18) A / D converter: 8 bits × 8 channels Can be masked-programmed to be parallel inputs. 19) Watch-dog timer Setting period: 4 20) Linear circuits DFG: amplifier / comparator CFG: amplifier / comparator CTL: differential amplifier / comparator DPG: comparator
■ DESCRIPTION The AA51880 is a BJT integrated circuit using in Servo motor control applications. The built-in voltage regulator provides the AA51880 with extremely stable output voltage. It also incorporates a linear one-shot and pulse-width demodulator for improved positional accuracy.
■ FEATURES • Built-in voltage regulator. • Larger driving capability. • Internal output NPN power transistor. • Adjustable dead band range control. • Incorporates a protection circuit for "H-Bridge" driving configuration. • Small outline package.
■ APPLICATIONS • Servo motor control. • Radio controlled car, boat, and airplane. • IA products (such as air-condition). • Remote positioning.
DESCRIPTION TDA7522 is a single chip processor consisting of Decoder, Servo and 1bit D/A for 4times CD-ROM / CDAudio. Main concept of this IC is that it is based on embedded System Micro Controller which allows customer to develop system software very easily: just based on provided commands. Further the microcontroller is fully customer dedicated in terms of both software and general purpose Port.
■ BUILT IN 8Bit MICROCONTROLLER (STANDARD ST7) with: – 24 KByte ROM available for ST7 & Servo-Audio DSP – 1024Byte RAM, including 128byte stack – 4KByte RAM for CD-Text memory (for 1block) – Built in R-W subcode buffer (Max. 144Byte 8packs) for CD-Text – 24 bit general I/O port (PoartA[7-0], PortB[7-0], PortC[7-0]) – One External Interrupt (16 IRQ encoder inside) – 16bit free running counter timer – 8bit 1ch general purpose A/D – I2C bus I/F – Watch dog – Kenwood I/F ■ STAND-BY MODE (Stop all clocks and Shut down power of Peripheral (PON pin)) ■ BUILT IN Servo & AUDIO DIGITAL SIGNAL PROCESSOr (SAC-DSP) inclusive of: – 1024x19bit Program RAM – 512x16bit Coefficient RAM – 1024x20bit Data RAM – 128x6bit Decimation RAM – MAC: 16 bit (Coefficients) x 20 bit (data) multiplier with 38 bit adder – Instruction execution rate as high as 56MIPS ■ BUILT IN PROGRAMMABLE CLOCK GENERATOR PLL ■ PERIPHERALS for CD PLAYER APPLICATION – Data Acquisition, Erasure correction, CLV&CAV controller – Subcode decoder (CD-Text, CD-Graphic I/F) – Shock proof memory controller, Disturbance detector – Decimation filter ■ ACTUATORS DRIVING MODE SELECTABLE between PWM or PDM MODE ■ 256Fs / 384Fs (16.9344MHz) CLOCK INPUT.