JPS62166540U

JPS62166540U -

Info

Publication number: JPS62166540U
Application number: JP5427186U
Authority: JP
Priority date: 1986-04-10
Filing date: 1986-04-10
Publication date: 1987-10-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図は第１図に示す各部の波形を示すタイムチ
ヤートである。１……ワンシヨツトマルチバイブレータ、２…
…インバータ、３……ＡＮＤゲート、４……ワン
シヨツトマルチバイブレータ、５……インバータ
、６……セレクタ、７……ＲＡＭ、１０１……Ｗ
ＲＩＴＥパルス入力端子、１０２……ＲＥＡＤパ
ルス入力端子、１０３……ＷＲＩＴＥアドレス入
力端子、１０４……ＲＥＡＤアドレス入力端子、
１０５……データ入力端子、１０６……データ出
力端子、ａ……ＷＲＩＴＥパルス、ｂ……ワンシ
ヨツト出力、ｃ……ＲＥＡＤパルス、ｄ……ＲＥ
ＡＤパルス反転信号、ｅ……ＡＮＤゲート出力、
ｆ……ワンシヨツト出力、ｇ……ＷＲＩＴＥパル
ス。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a time chart showing the waveforms of each part shown in FIG. 1...One-shot multivibrator, 2...
...Inverter, 3...AND gate, 4...One shot multivibrator, 5...Inverter, 6...Selector, 7...RAM, 101...W
RITE pulse input terminal, 102...READ pulse input terminal, 103...WRITE address input terminal, 104...READ address input terminal,
105...Data input terminal, 106...Data output terminal, a...WRITE pulse, b...One shot output, c...READ pulse, d...RE
AD pulse inversion signal, e...AND gate output,
f...One shot output, g...WRITE pulse.

Claims

[Scope of utility model registration request]

A one-shot multivibrator that receives the first WRITE pulse as input and generates the first one-shot output, and a one-shot multivibrator that inverts the READ pulse and generates a READ pulse.
a first inverter that outputs a pulse inversion signal;
an AND gate that generates an AND gate output by calculating the AND of the first one-shot output and the READ pulse inversion signal; and a second one-shot multi-function circuit that receives the AND gate output as input and generates a second one-shot output. vibrator and a second WRI by inverting the second one-shot output.
A buffer circuit comprising a second inverter that outputs a TE pulse, a selector that switches an address signal, and a RAM.