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BU34381 Datasheet

  • BU34381

  • Single-chip 4-bit microcontroller for

  • 10頁

  • ROHM

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Optical disc ICs
Single-chip 4-bit microcontroller for
CD-DA
BU34381
The BU34381 is a 4-bit microcomputer designed for CD-DA players, and has a wide array of internal I / O components,
including an 8-bit, 8-channel AD converter, pulse width counter (PWC), two serial I / O, and an LCD controller / driver
capable of displaying up to 80 segments. All LCD segments are programmable for CMOS output. These I / O compo-
nents allow for multifunction applications with a low number of pins.
FApplications
Portable CD-DA players, portable CD stereos
FFeatures
1) High speed operations and low voltage. (V
DD
= 2.7
X
5.5V at 4.4MHz)
2) Internal 8-bit, 8-channel AD converter.
3) Internal pulse width counter.
4) Two internal serial input / outputs.
5) Internal 20-segment, 4-common LCD control-
ler / driver. (usable with 3 commons)
6) All segments output by the LCD controller / driver are
programmable for CMOS output.
FAbsolute
maximum ratings (Ta = 25_C)
FRecommended
operating conditions (Ta = 25_C)
91

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