发明名称 |
Data transmission system between a main CPU board having a wait signal generating latch and a plurality of CPU boards |
摘要 |
A data transmission system between a main CPU and a plurality of sub-CPU's includes a data bus connected between them, a CPU select line for transmitting a CPU select signal from the main CPU to the sub-CPU's, a latch circuit for providing a wait signal to the main CPU upon write or read in the main CPU with respect to the sub-CPU's and a wait clear line connected between the respective CPU's to provide to the latch circuit a wait clear signal upon completion of input and output of the sub-CPU to release the waited state of the main CPU, the transmission system being thereby simplified to reduce installation space and wiring labor.
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申请公布号 |
US4831516(A) |
申请公布日期 |
1989.05.16 |
申请号 |
US19860830101 |
申请日期 |
1986.02.18 |
申请人 |
NITSUKO LIMITED;NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
TANAKA, KINZI;SHIGEMATSU, MINORU;TANIMOTO, YOSHIJI;OKUMURA, MINORU |
分类号 |
G06F12/06;G06F13/42;G06F15/17;H04M9/00 |
主分类号 |
G06F12/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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