JPH0390345U

JPH0390345U -

Info

Publication number: JPH0390345U
Application number: JP15104989U
Authority: JP
Priority date: 1989-12-28
Filing date: 1989-12-28
Publication date: 1991-09-13

Description

[Brief explanation of drawings]

第１図は、本考案の割り込み制御機能を有する
マイクロコンピユータの主要構造部を示すブロツ
ク図、第２図は、本考案の動作タイミング図、第
３図は、本考案の応用例を示すブロツク図、第４
図は、本考案の応用例における位相制御系のブロ
ツク図、第５図は、本考案の応用例における位相
制御系のタイミング図、第６図ａは、従来の外部
割り込み要求信号発生回路を示すブロツク図、第
６図ｂは、従来のマスク期間設定回路を示すブロ
ツク図、第７図は従来技術における動作タイミン
グ図、第８図は、従来技術で用いられるソフトウ
エアの処理を示す図である。１……割り込み入力端子、２……シユミツト回
路、３……割り込み制御回路、４……割り込み要
求信号、５……内部バス、６……コンペアレジス
タ、７……コンパレータ、８……タイマ、９……
コンパレータ一致信号、１０……タイマ初期化（
クリア）信号、１１……速度誤差量検出部、１２
……位相誤差量検出部、１３……ループフイルタ
、１４……速度制御系ゲイン、１５……位相制御
系ゲイン、１６……ＰＷＭ変換部、１７……ドラ
ムモータ、１８……ＦＧ信号検出用磁気ヘツド、
１９……ＰＧ信号検出用磁気ヘツド、２０……Ｆ
Ｇ信号増幅器、２１……ＰＧ信号増幅器、２２…
…ヘツドスイツチング信号入力端子、２３……立
ち上がり／立ち下がり両エツジ検出部、２４……
フリー・ランニング・カウンタ（ＦＲＣ）、２５
……キヤプチヤレジスタ０、２６……キヤプチヤ
レジスタ１、２７……外部割り込み要求信号、２
８……マスク信号、２９……汎用タイマ。 Fig. 1 is a block diagram showing the main structural parts of a microcomputer having an interrupt control function of the invention, Fig. 2 is an operation timing diagram of the invention, and Fig. 3 is a block diagram showing an application example of the invention. , 4th
The figure shows a block diagram of a phase control system in an application example of the present invention, Figure 5 shows a timing diagram of a phase control system in an application example of the invention, and Figure 6a shows a conventional external interrupt request signal generation circuit. FIG. 6b is a block diagram showing a conventional mask period setting circuit, FIG. 7 is an operation timing diagram in the prior art, and FIG. 8 is a diagram showing software processing used in the prior art. . 1... Interrupt input terminal, 2... Schmitt circuit, 3... Interrupt control circuit, 4... Interrupt request signal, 5... Internal bus, 6... Compare register, 7... Comparator, 8... Timer, 9 ……
Comparator match signal, 10...Timer initialization (
Clear) signal, 11...Speed error amount detection section, 12
...Phase error amount detection section, 13 ... Loop filter, 14 ... Speed control system gain, 15 ... Phase control system gain, 16 ... PWM conversion section, 17 ... Drum motor, 18 ... For FG signal detection magnetic head,
19...Magnetic head for PG signal detection, 20...F
G signal amplifier, 21...PG signal amplifier, 22...
...Head switching signal input terminal, 23...Rising/falling edge detection section, 24...
Free Running Counter (FRC), 25
...Capture register 0, 26...Capture register 1, 27...External interrupt request signal, 2
8...Mask signal, 29...General purpose timer.

Claims

[Scope of utility model registration request]

In a microcomputer having an interrupt control function, an input terminal to which a reference pulse of a constant period is supplied, means for holding a predetermined count value, means for sequentially performing a counting operation from an initialized count value, and the holding means and means for comparing the respective count values of the counting means, and means for controlling the output state of the output signal by a reference pulse from the input terminal and a coincidence signal from the comparing means, and the control means includes: By inputting a reference pulse, the count value of the counting means is initialized and outputting of the output signal is prohibited, and by inputting the coincidence signal, outputting the output signal is permitted. microcomputer.