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M37754M8C-XXXGP Datasheet(PDF) 6 Page - Mitsubishi Electric Semiconductor |
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M37754M8C-XXXGP Datasheet(HTML) 6 Page - Mitsubishi Electric Semiconductor |
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6 / 114 page  MITSUBISHI MICROCOMPUTERS M37754M8C-XXXGP, M37754M8C-XXXHP M37754S4CGP, M37754S4CHP 6 PRELIMINAR Y Notice: This is not a final specification. Some parametric limits are subject to change. SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Functions I/O Input/ Output Name Pin P100 – P107 I/O port P10 In single-chip mode, these pins have the same functions as port P0. In memory expansion mode or microprocessor mode, these pins become data I/O pins and operate as follows: (1) When using 16-bit width as external data bus width: • Accessing external memory <When reading> Pins’ value is input into low-order internal data bus (DB0 to DB7). <When writing> Value of low-order internal data bus (DB0 to DB7) is output to these pins. • Accessing internal memory <When reading> These pins become high impedance. <When writing> Value of internal data bus is output to these pins. (2) When using 8-bit width as external data bus width: • Accessing external memory <When reading> Pins’ value is input into internal data bus. The value is input into low-order internal data bus (DB0 to DB7) when accessing an even address; it is input into high-order internal data bus (DB8 to DB15) when accessing an odd address. <When writing> Value of internal data bus is output to these pins. The value of low-order internal data bus (DB0 to DB7) is output when accessing an even address; the value of high-order internal data bus (DB8 to DB15) is output when accessing an odd address. • Accessing internal memory <When reading> These pins become high impedance. <When writing> Value of internal data bus is output to these pins. When the external bus width is 8 bits, the mode where low-order address ___ ___ (LA0 – LA7) is output when RD or WR output is “H” and data (D0 – D7) is ___ ___ input/output when RD or WR output is “L” can be selected in specified external memory area access cycle. In single-chip mode, these pins have the same functions as port P0. In memory expansion mode or microprocessor mode, these pins operate as follows: (1) When using 16-bit width as external data bus width • Accessing external memory <When reading> The value is input into high-order internal data bus (DB8 to DB15) when accessing an odd address; these pins enter high impedance state when not accessing an odd address. <When writing> Value of high-order internal data bus (DB8-DB15) is output to these pins. • Accessing internal memory <When reading> These pins enter high impedance state. <When writing> Value of internal data bus is output to these pins. (2) When using 8-bit width as external data bus width These pins become I/O port P110 – P117. P110 – P117 I/O port P11 I/O |
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