Sharp MZ-3500 service manual MZ3500 PD1990AC Block diagram, Lsb Msb

MZ3500

3)^PD1990AC Block diagram

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Command specification
C2	C1	CO	Command
0	0	0	Register hold
0	0	1	Register shift
0	1	0	Time set
0	1	1	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	Data Shift	Note
1Hz		Not possible	Data retention
[LSB]	Output of LSB	Possible	Shifts in synchronization
			with the clock
ILSB]	Output	Not possible
[LSB]	Output	Not possible

Input/output format

Example: In the case of 10 o'clock, 25 minutes, 49 seconds, July 30th.

(LSB)								(MSB)
9	4	5	2	0	1	0	3	7
«- Seconds—' L(\/jnutes—I				Lnoure_)		L_Dey—I		Wo!OnthJ

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