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부품번호 | PCA9556 기능 |
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기능 | Octal SMBus Registered Interface | ||
제조업체 | NXP Semiconductors | ||
로고 | |||
전체 12 페이지수
INTEGRATED CIRCUITS
PCA9556
Octal SMBus Registered Interface
Product specification
1998 Dec 18
Philips
Semiconductors
Philips Semiconductors
Octal SMBus Registered Interface
SIMPLIFIED SCHEMATIC OF I/O0
DATA FROM
SHIFT REGISTER
DATA FROM
SHIFT REGISTER
WRITE MASK PULSE
INPUT/OUTPUT
MASK REGISTER
DQ
FF
CK Q
WRITE PULSE
WRITE
REGISTER
DQ
FF
CK Q
READ PULSE
DATA FROM
SHIFT REGISTER
WRITE
POLARITY
PULSE
READ
REGISTER
DQ
FF
CK Q
POLARITY
REGISTER
DQ
FF
CK Q
NOTE: ON POWER-UP OR RESET, ALL REGISTERS RETURN TO DEFAULT VALUES
Figure 3. Simplified schematic of I/O0
Product specification
PCA9556
OUTPUT PORT
REGISTER DATA
I/O0
ESD PROTECTION DIODE
VSS
INPUT PORT
REGISTER DATA
POLARITY
REGISTER DATA
su01047
1998 Dec 18
4
4페이지 Philips Semiconductors
Octal SMBus Registered Interface
Product specification
PCA9556
slave address
acknowledge
from slave
S 0 0 1 1 A2 A1 A0 0 A
R/W
acknowledge
from slave
slave address
acknowledge
from slave
acknowledge
data from register from master
COMMAND BYTE
A S 0 0 1 1 A2 A1 A0 1 A
at this moment master-transmitter
becomes master-receiver and
slave-receiver becomes
slave-transmitter
R/W
DATA
first byte
A
data from register
no acknowledge
from master
DATA
last byte
NA P
Figure 8. READ from register via Read byte protocol
su01052
SDA
READ FROM
PORT
DATA INTO
PORT
slave address
data from port
S 0 0 1 1 A2 A1 A0 1 A
start condition
R/W acknowledge
from slave
DATA 1
data from port
A
acknowledge
from master
DATA 4
NA P
no acknowledge
from master
stop
condition
DATA 2
DATA 3
DATA 4
tph tps
Notes:
1. This figure assumes the command byte has previously been programmed with 00h.
2. Transfer of data can be stopped at any moment by a stop condition. When this occurs,
data present at the last acknowledge phase is valid (output mode). Input data is lost.
Figure 9. READ input port register via Receive byte protocol
su01051
1998 Dec 18
7
7페이지 | |||
구 성 | 총 12 페이지수 | ||
다운로드 | [ PCA9556.PDF 데이터시트 ] |
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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 ] |
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