Epson RTC-4543SB - Manual (Page 8)

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