BU34381 ROHM Co. Ltd., BU34381 Datasheet

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BU34381

Manufacturer Part Number
BU34381
Description
Single-chip 4-bit Microcontroller For
Manufacturer
ROHM Co. Ltd.
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
BU34381
Manufacturer:
ROHM/罗姆
Quantity:
20 000
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
2) Internal 8-bit, 8-channel AD converter.
3) Internal pulse width counter.
4) Two internal serial input / outputs.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
Single-chip 4-bit microcontroller for
CD-DA
BU34381
Optical disc ICs
5.5V at 4.4MHz)
DD
= 2.7 X
5) Internal 20-segment, 4-common LCD control-
6) All segments output by the LCD controller / driver are
ler / driver. (usable with 3 commons)
programmable for CMOS output.
91

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BU34381 Summary of contents

Page 1

... CD-DA BU34381 The BU34381 is a 4-bit microcomputer designed for CD-DA players, and has a wide array of internal components, including an 8-bit, 8-channel AD converter, pulse width counter (PWC), two serial and an LCD controller / driver capable of displaying segments. All LCD segments are programmable for CMOS output. These compo- nents allow for multifunction applications with a low number of pins ...

Page 2

... Optical disc ICs FBlock diagram 92 BU34381 ...

Page 3

... Optical disc ICs FPin assignments FPin descriptions BU34381 93 ...

Page 4

... Optical disc ICs 94 BU34381 ...

Page 5

... Optical disc ICs FInput / output circuits BU34381 95 ...

Page 6

... Optical disc ICs FElectrical characteristics (at 5V) (unless otherwise noted 25_C BU34381 = 5V) DD ...

Page 7

... Optical disc ICs BU34381 97 ...

Page 8

... Optical disc ICs FElectrical characteristics (at 3V) (unless otherwise noted 25_C BU34381 = 3V) DD ...

Page 9

... input is programmable in 1-bit units as digital : 3 factors input (13) Internal 8-bit timer counter (also used as event counter) (14) Two internal serial input / outputs (LSB fast) that simplify interface with external LSI chips (15) 12 input / outputs (programmable pull-up) (16) 5 inputs (programmable pull-up) BU34381 99 ...

Page 10

... Optical disc ICs FExternal dimensions (Units: mm) 100 BU34381 ...

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