BU34440 Ver la hoja de datos (PDF) - ROHM Semiconductor

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componentes Descripción

Fabricante

BU34440

Single-chip 4-bit microcontroller for CD-DA

ROHM Semiconductor 

Optical disc ICs

FHardware descriptions

(1) Operates on a single power supply (VDD=2.3 X

5.5V).

(2) Memory size

ROM: 4096 8 bits

RAM: 256 4 bits

(3) Instruction execution time (1 cycle instruction)

1.5µsec: (at 4MHz)

(4) Subroutine nesting : 8 levels

(5) Interrupts: 4 factors

External: 2 factors

Internal (timer / counter, serial I / O)

: 2 factors

(6) ROM data table function (data table area : 4kB)

BU34440

(7) Two energy-saving modes (STOP / HALT)

(8) Internal 8-bit timer counter

(9) Internal serial I / O, simplifying interface with at-

tached LSIs (LSB first)

(10) 14 programmable pull-up input / outputs

(11) 5 programmable pull-up inputs

FExternal dimensions (Units: mm)

107

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