3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
CS
t
t
DS
DS
t
CSH
t
CSS
t
t
DH
DH
SCK
SIO
Figure 10 Timing Diagram 1 during 3-wire Communication
t
ISU
t
R
t
F
80% 80%
20% 20%
SCK
t
IHO
80%
20%
80%
20%
Input data
t
R
, tF
Figure 11 Timing Diagram 2 during 3-wire Communication
t
SCK
tSCK
SCK
50%
20%
50%
50%
t
ACC
80%
20%
80%
20%
Output data
Figure 12 Timing Diagram 3 during 3-wire Communication
8
Seiko Instruments Inc.