전자부품 반도체 검색엔진( 무료 PDF 다운로드 ) - 데이터시트뱅크
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ICM7170 데이터 시트보기 (PDF) - Intersil
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ICM7170
Microprocessor-Compatible, Real-Time Clock
Intersil
ICM7170 Datasheet PDF : 13 Pages
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Timing Diagrams
ICM7170
A0 - A4, CS
RD
ADDRESS VALID, CS LOW
t
AS
t
AR
t
CYC
t
RD
D0 - D7
t
ACC
OUTPUT DATA VALID
t
RX
FIGURE 1. READ CYCLE TIMING FOR NON-MULTIPLEXED BUS (ALE = V
IH
, WR = V
IH
)
A0 - A4, CS
WR
D0 - D7
ADDRESS VALID, CS LOW
t
AD
t
WA
t
CYC
t
WL
t
DW
t
WD
INPUT DATA VALID
FIGURE 2. WRITE CYCLE TIMING FOR NON-MULTIPLEXED BUS (ALE = V
IH
, RD = V
IH
)
A0 - A4, D0 - D7, CS
ALE
RD
ADDRESS VALID, CS LOW
t
LA
t
LL
t
ACC
OUTPUT DATA VALID
t
AR
t
AL
t
CYC
t
AS
t
RD
FIGURE 3. READ CYCLE TIMING FOR MULTIPLEXED BUS (WR = V
IH
)
12-9
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