Optical disc ICs Single-chip 4-bit microcontroller for CD-DA BU34675 The BU34675 is a compact 4-bit, single-chip microcontroller that includes all the I / O required for CD system control.
Circuits on the chip include a pulse width measurement counter (PWC), SIO, and an LCD controller / driver for a 28-segment display.
The LCD segments can all be switched in software to CMOS output, and the extensive I / O allows many functions with a low pin count.
FApplications Portable CD-DA, CD / radio / cassette players FFeatures 1) Low-voltage, high-speed operation (VDD = 2.
3 to 5.
5V at 4.
4MHz).
2) Pulse width measurement counter on chip (for remote control reception).
3) SIO provided for communicat...

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