Mz3500 – Sharp MZ-3500 User Manual
Page 75
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MZ3500
3)
a
^PD1990AC
Block diagram
-O DOU'l
-<3 ri>
Command specification
C2
Cl
CO
Command
Description
DOUT
Data Shift
Note
0
0
0
Register hold
Holds 40-bit S/R
1Hz
Not possible
Data retention
0
0
1
Register shift
Data input/output
[LSB] Output of LSB
Possible
Shifts
in
synchronization
with the dock
0
1
0
Time set
Data of the 40-bit S/R is
preset to the time counter.
(LSB) Output
Not possible
0
1
1
Time read
Data in the time counter
is read to the 40-bit S/R.
[LSB] Output
Not possible
Input/output format
Example; In the case of 10 o'clock, 25 minutes, 49 seconds, July 30th.
(LSB)
(MSB)
1
^ Seconds —
^
^Minutes—
^
^ ^Houre
J
^
^
—Day —
^
‘-Month
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