BU34440 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU34440

Single-chip 4-bit microcontroller for CD-DA

ROHM Semiconductor 

Optical disc ICs

Single-chip 4-bit microcontroller for

CD-DA

BU34440

The BU34440 is a single-chip 4-bit microcontroller designed for CD-DA and contains parallel I / O, serial I / O, tim-

er / counter and all other functions required for CD control in a single compact package.

FApplications

Portable CD-DA devices, portable CD stereos

FPin assignments

FFeatures

1) Low-voltage, high-speed operation (VDD=2.3 X 5.5V

at 4.4MHz).

2) 4k byte ROM, 256 nibble RAM.

3) Internal 8-bit SIO (LSB first).

4) 14 programmable pull-up input / outputs.

5) 5 programmable pull-up inputs.

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)

101

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