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MZ3500
3)
^PD1990AC
Block
diagram
OK
O
Command specification
C2 C1 CO
000
0 0 1
0 1 0
0 1 1
Command
Register
hold
Register
shift
Time
set
Time
read
Description
Holds
40-bit
S/R
Data
input/output
Data
of the
40-bit
S/R is
preset
to the
time counter.
Data
in the
time
counter
is
read
to the
40-bit
S/R.
DOUT
1Hz
[LSB]
Output
of LSB
ILSB]
Output
[LSB]
Output
Data
Shift
Not
possible
Possible
Not
possible
Not
possible
Note
Data
retention
Shifts
in
synchronization
with
the
clock
Input/output
format
Example:
In the
case
of 10
o'clock,
25
minutes,
49
seconds,
July
30th.
(LSB)
«-
Seconds—'
L(\/|j
nutes
—I
Ln
oure
_)
L_
Dey
—I
(MSB)
9
4
5
2
0
1
0
3
7
Won
!Onth
J
-
82
-