JPH03283567A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

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Publication number
JPH03283567A
JPH03283567A JP2083759A JP8375990A JPH03283567A JP H03283567 A JPH03283567 A JP H03283567A JP 2083759 A JP2083759 A JP 2083759A JP 8375990 A JP8375990 A JP 8375990A JP H03283567 A JPH03283567 A JP H03283567A
Authority
JP
Japan
Prior art keywords
terminal
data
prom
external
writing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2083759A
Other languages
Japanese (ja)
Other versions
JP2977576B2 (en
Inventor
Takashi Matsui
隆 松井
Toshiyuki Teramoto
寺本 俊幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8375990A priority Critical patent/JP2977576B2/en
Publication of JPH03283567A publication Critical patent/JPH03283567A/en
Application granted granted Critical
Publication of JP2977576B2 publication Critical patent/JP2977576B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Microcomputers (AREA)
  • Read Only Memory (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Semiconductor Memories (AREA)
  • Non-Volatile Memory (AREA)

Abstract

PURPOSE:To deal with an external PROM as an incorporated PROM by providing a chip with the output terminal of a booster power source, the output terminal of an address which accesses the external PROM, a terminal for a writing/ reading signal and an enable signal terminal. CONSTITUTION:A processor, an internal memory and a semiconductor integrated circuit incorporating a booster power source (one chip microcomputer) 20 are provided with a high voltage output terminal Vppo writing/reading signal output terminal WR for PROM writing, a memory address output terminal ADD, a data input/output terminal DATA and an enable signal terminal DO. An external EPROM 30 is provided with a high voltage terminal Vpp, a program terminal PROG for writing/reading control, an address terminal ADD for access, a data terminal DATA for memory input/output and a signal terminal-CE for chip enabling. The external EPROM 30 can be dealt as the incorporated EPROM of one chip microcomputer 20 by attaching the external EPROM 30 to the one chip microcomputer 20, and when re-starting, internal data and conditions are taken from the EPROM 30 for re-starting (continuing) the process by writing the internal data and the conditions in the external EPROM 30 previously.

Description

【発明の詳細な説明】 〔発明の概要〕 外部P l(OMの付設を容易にした半導体集積回路に
関し、 内1iPROMと同じように外部PROMを扱うことが
できる半導体集積回路装置を提供することを目的とし、 プロセッサ、PROMを含む内蔵メモリ、および該II
 ROM書込み用の昇圧電源を1つのチップ上に有する
半導体集積回路において、該チップに、該昇圧電源の出
力端子、外部PROMをアクセスするアドレスの出力端
子、書込みデータ用端子、書込み/読取り信号用端子、
イネーブル信号端子を設けるように構成する。
[Detailed Description of the Invention] [Summary of the Invention] An object of the present invention is to provide a semiconductor integrated circuit device that can handle an external PROM in the same way as an iPROM, regarding a semiconductor integrated circuit that facilitates the attachment of an external PROM. a processor, built-in memory including PROM, and said II
In a semiconductor integrated circuit having a boosted power supply for ROM writing on one chip, the chip has an output terminal of the boosted power supply, an address output terminal for accessing an external PROM, a write data terminal, and a write/read signal terminal. ,
The configuration is such that an enable signal terminal is provided.

〔産業上の利用分野〕[Industrial application field]

本発明は、外部P)IOHの付設を容易にした半導体集
積回路に関する。
The present invention relates to a semiconductor integrated circuit that facilitates the attachment of an external P)IOH.

ワンチップマイコンと呼ばれる半導体集積回路にはPR
OM (t!PROM、 kl!P)IOM)を内蔵し
、電源オフで消滅させたくない情報をこのPROMに蓄
えているものがある。しかしプロセッサ(CPU)と同
じチップ上に作られるP)70Mでは容量に限りがある
ので、上記情報が多量にある場合は外部P ROMを付
設してメモリ容量を拡張することが望まれる。
PR for semiconductor integrated circuits called one-chip microcontrollers
Some devices have a built-in OM (t!PROM, kl!P)IOM) that stores information that should not be lost when the power is turned off. However, since the P70M, which is manufactured on the same chip as the processor (CPU), has a limited capacity, it is desirable to expand the memory capacity by attaching an external PROM when a large amount of the above information is stored.

〔従来の技術〕[Conventional technology]

上記種類のワンチップマイコンは第5図に示すように、
チップ(半導体基板)10上にプロセッサ12、ROM
、RAM、 P)IOHなどの内蔵メモリ14、PRO
M書込み用の昇圧電源16を構成している。PROMを
書込むには、詳細回路は既知の通りで図示しないが、昇
圧電源16から高電圧(Vcc=5vに対してVPF=
20Vなどの高電圧)を供給し、プロセッサ12から書
込みデータを供給し、かつP)IOMを書込みモードに
する。続出しは通常の電源VCCを用いて行なう。
The above type of one-chip microcontroller is as shown in Figure 5.
Processor 12 and ROM on chip (semiconductor substrate) 10
, RAM, P) Built-in memory 14 such as IOH, PRO
It constitutes a boost power supply 16 for M writing. To write PROM, the detailed circuit is known and is not shown, but a high voltage (VCC = 5v, VPF =
20V), provide write data from the processor 12, and P) place the IOM in write mode. Successive output is performed using the normal power supply VCC.

半導体集積回路はあらゆる分野で利用され、その利用方
法は様々である。利用のされ方によっては、電源投入時
に初期設定し、それより制御を開始するのがよいものも
あれば、電源が切断されたときの情報を保管しておいて
、電源投入時にそれより制御を再開するのがよいものも
ある。PROMを用いると、後者の制御が可能になる。
Semiconductor integrated circuits are used in all fields, and there are various ways to use them. Depending on the usage, it may be better to initialize the settings and start the control when the power is turned on, or it may be better to save the information when the power is turned off and start the control from there when the power is turned on. Some things are best restarted. PROM allows for the latter control.

電源遮断中も情報を保持するには、電源遮断前にRAM
などのデータを、外部のバックアップ電源を備えるS)
IAMなどに転送するという方法もある。
To retain information during a power-off, store the information in RAM before power-off.
S) with external backup power supply
There is also a method of transferring to IAM etc.

勿論これにはバッテリなどのバックアップ電源が必要で
ある。
Of course, this requires a backup power source such as a battery.

〔発明が解決しようとする課題] プロセッサなどと同じチップ上に構成するP)IOMで
はメモリ容置に限りがある。そこで、これを拡張したい
場合は外部にPROMを付設することが考えられるが、
110Mの書込みには高電圧VPPが必要である。そこ
でライターを用い、ライターでPROMへ書込みを行な
い、書込み済みのIQIOMをワンチップマイコンへ接
続する、という方法が考えられるが、これはライターな
どを要して煩雑である。
[Problems to be Solved by the Invention] P) IOM, which is configured on the same chip as a processor, has a limited memory capacity. Therefore, if you want to expand this, you can consider attaching an external PROM,
Writing 110M requires high voltage VPP. Therefore, a method can be considered in which a writer is used to write to the PROM, and the written IQIOM is connected to a one-chip microcomputer, but this method requires a writer and is complicated.

本発明はか−る点を改善し、内蔵1’NO?+と同じよ
うに外部)’)IOMを扱うことができる半導体集積回
路装置を提供することをl]的とするものである。
The present invention improves this point and has a built-in 1'NO? The purpose of this invention is to provide a semiconductor integrated circuit device that can handle external IOMs in the same way as +.

〔課題を解決するための手段〕[Means to solve the problem]

第1図に示ずように本発明ではプロセッサ、内部メモリ
、昇圧電源内蔵半導体集積回路(ワンチップマイコン)
20に、PROM書込み用の高電圧出力端子V Pro
書込み/読取り信号出力端子WR、メモリアドレス出力
端子ADD、データ入出力端子DATA 、イネーブル
信号端子■を設ける。
As shown in FIG. 1, in the present invention, a semiconductor integrated circuit (one-chip microcomputer) with a built-in processor, internal memory, and boosted power supply is used.
20 is a high voltage output terminal V Pro for PROM writing.
A write/read signal output terminal WR, a memory address output terminal ADD, a data input/output terminal DATA, and an enable signal terminal ■ are provided.

また第2図に示すように本発明ではチップ(1()内に
書込み/読取りインタフェース18を設け、チップ周辺
に高電圧用の外部出力端子V PP01制御信号用の外
部出力端子CN T、アドレスとデータ用の翼部入出力
端子A/Dを設ける。
In addition, as shown in FIG. 2, in the present invention, a write/read interface 18 is provided in the chip (1), and external output terminals VPP01 for high voltage, external output terminals CN T for control signals, address and external output terminals are provided around the chip. A wing input/output terminal A/D for data is provided.

第1図の30はUPROMであり、書込み用高電圧端子
VPP、書込み/読取りIIJ御用のプログラム端子1
1ROG、メモリアクセス用のアドレス端子ADD。
30 in FIG. 1 is a UPROM, which includes a high voltage terminal VPP for writing and a program terminal 1 for writing/reading IIJ.
1ROG, address terminal ADD for memory access.

メモリ人出力データ用のデータ端子D A TA、チッ
プイネーブル用の信号端子CEを備える。この外部M 
P l? OM :30をワンチップマイコン20へ付
設するには図示のように端子V PPOとvrr、WR
とpuoc。
It has a data terminal DATA for memory output data and a signal terminal CE for chip enable. This external M
Pl? To attach OM:30 to the one-chip microcomputer 20, connect the terminals V PPO, vrr, and WR as shown in the diagram.
and puoc.

ADDとADD、DATAとDA1’A、 ■とCEを
接続すればよい。
Just connect ADD and ADD, DATA and DA1'A, and (2) and CE.

第2図の24.26は外部メモリ(f!FROM)であ
り、これをワンチップマイコン20へ付設するには電源
線11を端子V Proより、制御線!!を端子CN 
′rより、また端子A/DよりバスBをそれぞれ引き出
し、外部メモリ24.26を図示のように接続すればよ
い。22はアドレス/データのラッチである。
Reference numerals 24 and 26 in FIG. 2 are external memories (f!FROM), and in order to attach this to the one-chip microcomputer 20, connect the power supply line 11 from the terminal V Pro to the control line! ! The terminal CN
'r and the bus B from the terminal A/D, respectively, and connect the external memories 24 and 26 as shown. 22 is an address/data latch.

〔作用〕[Effect]

この第1図の構成で、外部t!PROM30をワンチッ
プマイコン20の内蔵tiPROMと同様に扱うことが
でき、内部データや状態を外部1!PROM30に書込
んでおい′ζ、再スタート時に該MPMON30より上
記内部データや状態を取込んで処理を再開(続行)する
ことができる。
With the configuration shown in FIG. 1, external t! The PROM 30 can be handled in the same way as the built-in tiPROM of the one-chip microcontroller 20, and the internal data and status can be transferred to the external 1! After writing in the PROM 30, the process can be restarted (continued) by fetching the internal data and status from the MPMON 30 at the time of restart.

不揮発性メモリFROMでのデータの保存が可能となれ
ば、データの退避だけでなく、必要な情報は全てこのF
ROMに保存しておくことができ、データ処理の規模も
大きくなる。
If it becomes possible to save data in non-volatile memory FROM, not only data can be saved, but all necessary information can be stored in this FROM.
It can be stored in ROM, and the scale of data processing becomes larger.

第2図も同様で、外部メモリ24.26を内蔵メモリ1
4と同様に扱うことができる。外部にPROM書込み用
の昇圧電源を用意する必要はない。
The same applies to Figure 2, where external memory 24 and 26 are replaced by internal memory 1.
It can be treated in the same way as 4. There is no need to provide an external step-up power supply for PROM writing.

〔実施例〕〔Example〕

第1図で外部FROM30への書込みを行なうには、ワ
ンチップマイコン20の端子■をLレベルにし、外部P
ROM30をイネーブルにする。また端子v rroに
は高電圧(20V程度)を出し、端子WRはHレベルに
し、アドレスとデータを順次出力する。
To write to the external FROM 30 in FIG.
Enable ROM30. Also, a high voltage (approximately 20V) is applied to the terminal v rro, the terminal WR is set to H level, and addresses and data are sequentially output.

第2図も同様であるが、WR,■は端子CN′rから、
またアドレスとデータはバスB1端子A/Dを通して出
力する。アドレスとデータはうッチ22に取込まれ、こ
れらを送出したのちCPUは他の仕事に移ることができ
る。バスはアドレスとデータで時分割使用することも可
能である。
The same is true in Fig. 2, but WR, ■ is from terminal CN'r,
Further, the address and data are outputted through the bus B1 terminal A/D. The address and data are taken into the watch 22, and after sending them out, the CPU can move on to other tasks. The bus can also be used in a time-sharing manner for addresses and data.

第3図に昇圧電源16の具体例を示す。TP。FIG. 3 shows a specific example of the boost power supply 16. T.P.

〜1゛P、。はPチャネルMOSトランジスタ、′I″
N1〜TNtoはnチャネルMO3)ランジスタで、こ
れらは図示のようにCMOSインバータ、ナントゲート
、フリップフロップなどを構成する。端子C1と02の
間にコンデンサCが、端子C1と03との間にコンデン
サ2C(Cの2倍の容量)が接続され、端子Vtには電
源vDllが接続され、端子V2とグランドの間にコン
デンサCがまた端子■3とグランドの間にコンデンサ2
Cが接続される。
~1゛P,. is a P-channel MOS transistor, 'I''
N1 to TNto are n-channel MO3) transistors, which constitute a CMOS inverter, a Nant gate, a flip-flop, etc. as shown in the figure. A capacitor C is connected between terminals C1 and 02, a capacitor 2C (twice the capacitance of C) is connected between terminals C1 and 03, a power supply vDll is connected to terminal Vt, and a capacitor C is connected between terminal V2 and ground. Capacitor C is also connected to capacitor 2 between terminal ■3 and ground.
C is connected.

CKI、CK2はクロックで、第4図に示すようにCK
2はCKIを1/2分周したものである。
CKI and CK2 are clocks, and as shown in Figure 4, CK
2 is CKI divided by 1/2.

この回路では最初のCKIがLSCK2がHではノート
■はH、ノード■はL1ノード■はHでTP、、はオフ
、またノード■はH1ノード■もHで’I’ N、。オ
ンあるから端子CIはLである。またノード■はH,ノ
ード■はLであるからTPtmがオンでC2=Vl=V
eoである。またノード■がHで、ノート■がHである
とTPt+はオン、T N 、。
In this circuit, when the first CKI and LSCK2 are H, the node ■ is H, the node ■ is L1, the node ■ is H and TP, , is off, and the node ■ is H1, and the node ■ is also H and 'I' N. Since it is on, the terminal CI is L. Also, since node ■ is H and node ■ is L, TPtm is on and C2 = Vl = V
It is eo. Further, when the node ■ is H and the note ■ is H, TPt+ is on, T N .

はオフ、1”P、、がオフ、i’ N 、 、がオン、
従って1P1゜がオンであるからノード■はH(=V2
)、従ってノート■はり、i’P、。はオンで端子c3
はH(=V2)である。なおこのときV2.V3は11
である。
is off, 1”P, , is off, i' N , , is on,
Therefore, since 1P1° is on, node ■ is H (=V2
), therefore note ■ beam, i'P,. is on and terminal c3
is H (=V2). At this time, V2. V3 is 11
It is.

次にCK1=CK2=Hになると■はし、■はH1■は
し、i”P、、オン、■はし、■はり、’I’N、。
Next, when CK1=CK2=H, ■ is H1, ■ is H1, i'P,, on, ■ is, ■ is, 'I'N,'.

オフであるからCI ”=V 1 =Vooになる。こ
のときC2,C3等には変化がない。CKl=CK2=
Lのときも変化はない。CK1=H,CK2=Lになる
と■は■1、■も11、′r’ N 、。はオンになり
、端子C1はLになる。以下これを繰り返し、CIは第
4図の01の如く変化する。
Since it is off, CI''=V 1 =Voo. At this time, there is no change in C2, C3, etc. CKl=CK2=
There is no change when it is L. When CK1=H and CK2=L, ■ becomes ■1, ■ also becomes 11, 'r' N,. is turned on, and the terminal C1 becomes L. This is repeated thereafter, and the CI changes as shown in 01 in FIG.

CKI、CK2が2度目の共にHになると、端子C2は
容量カップリングにより2倍に昇圧する。
When both CKI and CK2 become H for the second time, the voltage at the terminal C2 is doubled due to capacitive coupling.

端子v2のコンデンサCはトランジスタ゛I’P、、を
通し°C端子C2の電圧が蓄積される。このときトラン
ジスタi’Pgsはオフである。同様に、端子■j号の
電位も端子v2と同じ電位になる。
The voltage at the terminal C2 is accumulated in the capacitor C at the terminal v2 through the transistor I'P. At this time, transistor i'Pgs is off. Similarly, the potential of terminal ■j also becomes the same potential as terminal v2.

3度目、4度目、・・・・・・のCKl=CK2=Hで
上記のことが繰り返され、端子C3,V3の電位は図示
のように次第に上昇する。C3が高電圧出力端である。
The above is repeated for the third time, fourth time, . . . when CKl=CK2=H, and the potentials of the terminals C3 and V3 gradually rise as shown in the figure. C3 is a high voltage output terminal.

端子V2.V3のコンデンサは電圧の変動を少なくする
ものである。
Terminal V2. The V3 capacitor reduces voltage fluctuations.

〔発明の効果〕〔Effect of the invention〕

以I;説明したように本発明ではオンボード状態でEl
″ROM等への書込み動作がi=1能であり、データの
保存、システムの再スタートが可能となる。EPRUM
PROM書込電源部などを特別に用意する必要なく、シ
ステムの簡素化が図れる。
I; As explained above, in the present invention, El
``Writing operations to ROM etc. are possible with i=1, making it possible to save data and restart the system.EPRUM
There is no need to prepare a special PROM write power supply unit, and the system can be simplified.

【図面の簡単な説明】[Brief explanation of the drawing]

第一1図及び第2図は本発明1.2の原理図、第3図は
昇圧電源部の実施例を示す回路図、第4図は第3図の動
作説明図、 第5図は従来例を示すブロック図である。 第1図、第2図で20はワンチップマイコン、l2はプ
ロセッサ、14は内蔵メモリ、16は昇圧ti、18ハ
(75’)エース、V Pro、WR。 ADD、 DATA、  L)0.  CN’I”、、
 A/Dは端子である。
Figures 11 and 2 are principle diagrams of the present invention 1.2, Figure 3 is a circuit diagram showing an embodiment of the boosted power supply section, Figure 4 is an explanatory diagram of the operation of Figure 3, and Figure 5 is the conventional FIG. 2 is a block diagram illustrating an example. In Figures 1 and 2, 20 is a one-chip microcomputer, l2 is a processor, 14 is a built-in memory, 16 is a booster ti, 18ha (75') ace, V Pro, WR. ADD, DATA, L)0. CN'I”,,
A/D is a terminal.

Claims (1)

【特許請求の範囲】 1、プロセッサ、PROMを含む内蔵メモリ、および該
PHOM書込み用の昇圧電源を1つのチップ上に有する
半導体集積回路において、 該チップに、該昇圧電源の出力端子(V_P_P_O)
、外部PROMをアクセスするアドレスの出力端子(A
DD)、書込みデータ用端子(DATA)、書込み/読
取り信号用端子(WR)、イネーブル信号端子(■)を
設けたことを特徴とする半導体集積回路。 2、プロセッサ(12)、PROMを含む内蔵メモリ(
14)、および該PROM書込み用の昇圧電源(16)
を1つのチップ上に有する半導体集積回路において、 該チップ上に書込み/読取りインタフェース(18)を
設け、 また該チップに、昇圧電圧の出力端子(V_P_P_O
)外部メモリの制御信号端子(CNT)、該メモリのア
ドレス及びデータの入出力端子(A/D)を設けたこと
を特徴とする半導体集積回路。
[Claims] 1. In a semiconductor integrated circuit having a processor, a built-in memory including a PROM, and a boosted power source for writing the PHOM on one chip, an output terminal (V_P_P_O) of the boosted power source is provided on the chip.
, the address output terminal (A
DD), a write data terminal (DATA), a write/read signal terminal (WR), and an enable signal terminal (■). 2. Processor (12), built-in memory including PROM (
14), and a boost power supply (16) for writing the PROM
A semiconductor integrated circuit having a write/read interface (18) on one chip, and a boosted voltage output terminal (V_P_P_O
) A semiconductor integrated circuit, characterized in that it is provided with a control signal terminal (CNT) for an external memory, and an input/output terminal (A/D) for address and data of the memory.
JP8375990A 1990-03-30 1990-03-30 Semiconductor integrated circuit Expired - Fee Related JP2977576B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8375990A JP2977576B2 (en) 1990-03-30 1990-03-30 Semiconductor integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8375990A JP2977576B2 (en) 1990-03-30 1990-03-30 Semiconductor integrated circuit

Publications (2)

Publication Number Publication Date
JPH03283567A true JPH03283567A (en) 1991-12-13
JP2977576B2 JP2977576B2 (en) 1999-11-15

Family

ID=13811495

Family Applications (1)

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JP8375990A Expired - Fee Related JP2977576B2 (en) 1990-03-30 1990-03-30 Semiconductor integrated circuit

Country Status (1)

Country Link
JP (1) JP2977576B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006172115A (en) * 2004-12-15 2006-06-29 Fujitsu Ltd Semiconductor memory device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009003991A (en) * 2007-06-19 2009-01-08 Toshiba Corp Semiconductor device and semiconductor memory test device

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JP2006172115A (en) * 2004-12-15 2006-06-29 Fujitsu Ltd Semiconductor memory device
JP4713143B2 (en) * 2004-12-15 2011-06-29 富士通セミコンダクター株式会社 Semiconductor memory device
US8717833B2 (en) 2004-12-15 2014-05-06 Spansion Llc Semiconductor memory device having non-volatile memory circuits in single chip

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