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

- 82

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