Table of Contents
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RTC - 4543 SA/SB
5-6. Timing Charts
( 1 ) Data read
WR
CE
CLK
t
CLKS
DATA
( 2 ) Data write
WR
CE
CLK
t
CLKS
DATA
( 3 ) FOUT output
FOUT
( 4 ) Disable/enable
FOE
FOUT
t
WRS
t
CES
t
CLK
t
t
CLKH
CLKL
t
r1
t
DATD
t
WRS
t
t
CES
CLK
t
t
CLKH
CLKL
t
r1
t
HD
t
SD
t
f2
10%
VIL
t
XZ
t
CE
t
f1
t
CE
t
f1
t
H
90%
t
r2
t
t
H
=
Duty
t
Disable
High impedance
Page - 5
t
WRH
t
CEH
t
RCV
t
DZ
t
WRH
t
t
CEH
RCV
50%
100 %
VIH
Enable
t
ZX
MQ - 252 - 03
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