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부품번호 | BU34675 기능 |
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기능 | Single-chip 4-bit microcontroller for | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
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-seg-
ment 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 re-
mote control reception).
3) SIO provided for communication with the DSP.
4) Seven-segment, four-common LCD controller / driv-
er on chip.
5) All segments of the LCD controller / driver output can
be switched to CMOS output using software.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
569
Optical disc ICs
FInput / output circuits
BU34675
572
4페이지 Optical disc ICs
FExplanation of the hardware
(1) Operates of a single power supply (VDD = 2.3 to
5.5V).
(2) Memory size
ROM:
6144 8 bits
RAM:
256 4 bits
LCD display RAM :
7 4 bits
(3) Instruction time (one cycle instruction)
1.5µsec (at 4 MHz)
(4) Sub-routine nesting: . . . . . . . . . . . . . . . . . 8 levels
(5) Interrupts: 5
External . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Internal (timer counter, serial I / O) . . . . . . . . . 2
(6) ROM data table function (6k data table region)
(7) Two power save modes STOP / HALT
FExternal dimensions (Units: mm)
BU34675
(8) On-chip 7-segment LCD driver that can drive a wide
variety of display types
Bias . . . . . . . . . . . . . . 1 / 3
Duty variation . . . . . . 1 / 3, 1 / 4 (programmable)
Internal bias resistors (approximately 50kΩ 3
stages)
(9) LCD segment output can be switched to CMOS out-
put by software.
The COM3 pin and upper three segments are one-bit
units, and the lower four segments are all selected to-
gether. At reset, switches to CMOS low-current output
port with low level polarity.
(10) Remote control receiver circuit (pulse width mea-
surement)
(11) On-chip 8-bit timer counter
(12) On-chip I / O system makes interfacing with exter-
nal LSI easy (LSB first).
(13) 8 I / O lines that can be pulled up by software
(14) 4 input lines that can be pulled up by software
575
7페이지 | |||
구 성 | 총 7 페이지수 | ||
다운로드 | [ BU34675.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BU34675 | Single-chip 4-bit microcontroller for | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |