JPS62175357U - - Google Patents

Info

Publication number
JPS62175357U
JPS62175357U JP6245986U JP6245986U JPS62175357U JP S62175357 U JPS62175357 U JP S62175357U JP 6245986 U JP6245986 U JP 6245986U JP 6245986 U JP6245986 U JP 6245986U JP S62175357 U JPS62175357 U JP S62175357U
Authority
JP
Japan
Prior art keywords
address
microprocessor
memory
ram
reset
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.)
Pending
Application number
JP6245986U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP6245986U priority Critical patent/JPS62175357U/ja
Publication of JPS62175357U publication Critical patent/JPS62175357U/ja
Pending legal-status Critical Current

Links

Description

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

第1図はこの考案の一実施例の説明するための
回路構成図、第2図はメモリサイクル、第3図は
メモリマツプである。 1……16ビツトマイクロプロセツサ(MPU
)、2……シフトレジスタ回路、3……上位アド
レスラツチ、4……下位アドレスラツチ、5……
上位アドレス発生回路、6……メモリ、7……マ
イクロプロセツサの上位アドレス、8……マイク
ロプロセツサの下位アドレス、9……上位アドレ
スバス、10……下位アドレスバス。
FIG. 1 is a circuit configuration diagram for explaining an embodiment of this invention, FIG. 2 is a memory cycle, and FIG. 3 is a memory map. 1...16-bit microprocessor (MPU)
), 2...shift register circuit, 3...upper address latch, 4...lower address latch, 5...
Upper address generation circuit, 6...Memory, 7... Upper address of microprocessor, 8... Lower address of microprocessor, 9... Upper address bus, 10... Lower address bus.

Claims (1)

【実用新案登録請求の範囲】 パワーオン時またはリセツト時のスタートアド
レスがメモリ空間の最下位または最上位から始ま
るマイクロプロセツサシステムにおいて、 前記メモリ空間の最下位または最上位を含むメ
モリ空間のRAM(ランダムアクセスメモリ)を
使用し、 その他の一部のメモリ空間にROM(リードオ
ンリメモリ)を使用する場合に、 パワーオン時またはリセツト時にマイクロプロ
セツサのアドレス出力を制御するシフトレジスタ
回路と、 固定アドレスを発生する回路または任意アドレ
ス設定できるアドレス発生回路とを有し、 これら回路の構成により、前記RAM領域のア
ドレスと上記ROM領域アドレスを入れ替えるよ
うにし、 パワーオン直後またはリセツト直後は、前記R
OMに書かれたプログラムに従つてマイクロプロ
セツサをイニシヤライズし、 マイクロプロセツサの任意サイクル後上記シヤ
フトレジスタ回路から発生するアドレス制御信号
により、 前記RAM領域と上記ROM領域のメモリマツ
ピングアドレスを再配置するようにしたことを特
徴とするマイクロプロセツサの起動回路。
[Claims for Utility Model Registration] In a microprocessor system where the start address at power-on or reset starts from the lowest or highest position of the memory space, the RAM (RAM) of the memory space including the lowest or highest position of the memory space When using ROM (read-only memory) for some other memory spaces, there is a shift register circuit that controls the address output of the microprocessor at power-on or reset, and a fixed address. or an address generation circuit that can set an arbitrary address, and the configuration of these circuits allows the addresses of the RAM area and the ROM area address to be exchanged, and immediately after power-on or reset, the R
The microprocessor is initialized according to the program written in the OM, and after an arbitrary cycle of the microprocessor, the memory mapping addresses of the RAM area and the ROM area are rearranged by the address control signal generated from the shift register circuit. A microprocessor startup circuit characterized in that the microprocessor startup circuit is configured to perform the following steps.
JP6245986U 1986-04-24 1986-04-24 Pending JPS62175357U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6245986U JPS62175357U (en) 1986-04-24 1986-04-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6245986U JPS62175357U (en) 1986-04-24 1986-04-24

Publications (1)

Publication Number Publication Date
JPS62175357U true JPS62175357U (en) 1987-11-07

Family

ID=30896760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6245986U Pending JPS62175357U (en) 1986-04-24 1986-04-24

Country Status (1)

Country Link
JP (1) JPS62175357U (en)

Similar Documents

Publication Publication Date Title
JPS62175357U (en)
JPS62169831U (en)
JPH0267433U (en)
JPS6446862U (en)
JPS6245798U (en)
JPS6353152U (en)
JPH0299446U (en)
JPS6335104U (en)
JPS6392959U (en)
JPH01177499U (en)
JPH03113453U (en)
JPS62175352U (en)
JPH02143646U (en)
JPH0179164U (en)
JPS6392971U (en)
JPS63130839U (en)
JPS6266329U (en)
JPH01138143U (en)
JPH0179142U (en)
JPH0415743U (en)
JPH0370652U (en)
JPH03124229U (en)
JPS6389146U (en)
JPS6356449U (en)
JPS6399945U (en)