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M30805MG-XXXGP Datasheet(PDF) 7 Page - Mitsubishi Electric Semiconductor |
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M30805MG-XXXGP Datasheet(HTML) 7 Page - Mitsubishi Electric Semiconductor |
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7 / 315 page  Pin Description Under development Preliminary Specifications REV.B Specifications in this manual are tentative and subject to change. Mitsubishi microcomputers M16C/80 (144-pin version) group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER 7 VCC, VSS CNVSS XIN XOUT BYTE AVCC AVSS VREF P00 to P07 D0 to D7 P10 to P17 D8 to D15 P20 to P27 A0 to A7 A0/D0 to A7/D7 P30 to P37 A8 to A15 A8/D8 to A15/D15 Signal name Power supply input CNVSS Reset input Clock input Clock output External data bus width select input Analog power supply input Reference voltage input I/O port P0 I/O port P1 I/O port P2 I/O port P3 Supply 4.2 to 5.5 V to the VCC pin. Supply 0 V to the VSS pin. Function This pin switches between processor modes. Connect it to the VSS when operating in single-chip or memory expansion mode after reset. Connect it to the VCC when in microprocessor mode after reset. A “L” on this input resets the microcomputer. These pins are provided for the main clock generating circuit. Connect a ceramic resonator or crystal between the XIN and the XOUT pins. To use an externally derived clock, input it to the XIN pin and leave the XOUT pin open. This pin selects the width of an external data bus. A 16-bit width is selected when this input is “L”; an 8-bit width is selected when this input is “H”. This input must be fixed to either “H” or “L”. When not using the external bus,connect this pin to VSS. This pin is a power supply input for the A-D converter. Connect this pin to VCC. This pin is a power supply input for the A-D converter. Connect this pin to VSS. This pin is a reference voltage input for the A-D converter. This is an 8-bit CMOS I/O port. It has an input/output port direction register that allows the user to set each pin for input or output individually. When set for input in single chip mode, the user can specify in units of four bits via software whether or not they are tied to a pull-up resistance. In memory expansion and microprocessor mode, an built-in pull-up resistance cannot be used. However, it is possible to select pull-up resistance presence to the usable port as I/O port by setting. When set as a separate bus, these pins input and output data (D0–D7). This is an 8-bit I/O port equivalent to P0. P15 to P17 also function as external interrupt pins as selected by software. When set as a separate bus, these pins input and output data (D8–D15). This is an 8-bit I/O port equivalent to P0. These pins output 8 low-order address bits (A0–A7). If a multiplexed bus is set, these pins input and output data (D0–D7) and output 8 low-order address bits (A0–A7) separated in time by multiplexing. This is an 8-bit I/O port equivalent to P0. These pins output 8 middle-order address bits (A8–A15). If the external bus is set as a 16-bit wide multiplexed bus, these pins input and output data (D8–D15) and output 8 middle-order address bits (A8–A15) separated in time by multiplexing. Pin name Input Input Input Output Input Input Input/output Input/output Input/output Input/output I/O type Analog power supply input Input/output Output Input/output Input/output Output Input/output RESET MA0 to MA7 If accessing to DRAM area, these pins output row address and column address separated in time by multiplexing. Output Pin Description |
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