Description

The CXP402 is a CMOS 4-bit single chip microcomputer which consists of 4-bit CPU, ROM, RAM, 8-bit timer, 8-bit timer/counter, 18-bit time-base timer, LCD controller/driver, digital signal processor circuit for CD player, 1-bit DAC and the like.

Features

• Instruction cycle 1.89µs for 16.93MHz oscillation

• ROM capacity 6144 × 8 bits

• RAM capacity 400 × 4 bits (Including stack and display area)

• LCD controller/driver (Enables to direct drive)

• 8-bit timer, 8-bit timer/event counter and 18-bit time-base timer are incorporated; they are independently controllable.

• Arithmetic and logical operations between the entire RAM area, I/O area and the accumulator by means of the memory mapped I/O.

• Entire ROM area can be referred by the table lookup instruction.

Digital Signal Processor (DSP) Block

• Playback mode supporting CAV (Constant Angular Velocity)

• Frame jitter free

• Allows relative rotational velocity readout

• Supports spindle external control

• Wide capture range playback mode

• Spindle rotational velocity following method

• 16K RAM

• EFM data demodulation

• Enhanced EFM frame sync signal protection

• SEC strategy-based error correction

• Subcode demodulation and Sub Q data error detection

• Digital spindle servo

• 16-bit traverse counter

• Asymmetry correction circuit

• Servo auto sequencer

• Digital audio interface output

• Digital peak meter

Digital Filter, DAC and Analog Low-Pass Filter Blocks

• DBB (digital bass boost) function

• Digital de-emphasis

• Digital attenuation

• Zero detection function

• 8Fs oversampling digital filter

• S/N: 100dB or more (master clock: 384Fs, typ.) Logical value: 109dB

• THD + N: 0.007 or less (master clock: 384Fs, typ.)

• Rejection band attenuation: –60dB or more

• 112-pin plastic LQFP

• Piggyback package (CXP401Z) available