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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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M16C/62 데이터시트(PDF) 556 Page - Renesas Technology Corp |
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M16C/62 데이터시트(HTML) 556 Page - Renesas Technology Corp |
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556 / 615 page  External Buses Mitsubishi microcomputers M16C / 62A Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER 2-239 ________ (2) RDY function usage ________ To use the RDY function, set a software wait. ________ ________ The RDY function operates when the BCLK signal falls with the RDY pin at “L”; the bus does not vary for 1 BCLK, and the state at that moment is held. ________ ________ The RDY function holds the state of bus for the period in which the RDY pin is at “L”, and releases it ________ ________ when the BCLK signal falls with the RDY pin at “H”. Figure 4.4.6 shows an example of RDY circuit that holds the state of bus for 1 BCLK. ________ Figure 4.4.6. Example of RDY circuit holding state of bus for 1 BCLK CK D R S BCLK RD CS0 RDY 1Q 1Q CK D R S 2Q 2Q (1) RDY accepted (2) RDY cleared The state of data bus and that of address bus are held for the period between (1) and (2). BCLK CS0 RD 2Q 1Q RDY (1) (2) (1) (2) BCLK CS0 RD 2Q 1Q RDY (1) (2) • Timings in separate bus • Timings in multiplex bus (1) (2) |
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