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M32C/86 数据表(PDF) 32 Page - Renesas Technology Corp |
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M32C/86 数据表(HTML) 32 Page - Renesas Technology Corp |
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32 / 505 page  Page 9 1. Overview 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M Apply 4.2 V to 5.5 V to the VCC pin. Apply 0V to the VSS pin Supplies power to the A/D converter. Connect the AVCC pin to VCC and the AVSS pin to VSS ___________ The microcomputer is in a reset state when "L" is applied to the RESET pin Switches processor mode. Connect the CNVSS pin to VSS to start up in single-chip mode or to VCC to start up in microprocessor mode Switches data bus width in external memory space 3. The data bus is 16 bits wide when the BYTE pin is held "L" and 8 bits wide when it is held "H". Set to either. Connect the BYTE pin to VSS to use the microcomputer in single-chip mode Inputs and outputs data (D0 to D7) while accessing an external memory space with separate bus Inputs and outputs data (D8 to D15) while accessing an external memory space with 16-bit separate bus Outputs address bits A0 to A22 Outputs inversed address bit A23 Inputs and outputs data (D0 to D7) and outputs 8 low-order address bits (A0 to A7) by time-sharing while accessing an external memory space with multiplexed bus Inputs and outputs data (D8 to D15) and outputs 8 middle-order address bits (A8 to A15) by time-sharing while accessing an external memory space with 16-bit multiplexed bus _______ _______ Outputs CS0 to CS3 that are chip-select signals specifying an external space ________ _________ ______ ________ _____ ________ _________ Outputs WRL, WRH, (WR, BHE) and RD signals. WRL and WRH can be ______ _______ switched with WR and BHE by program ________ _________ _____ WRL, WRH and RD selected: If external data bus is 16 bits wide, data is written to an even address in ________ external memory space when WRL is held "L". _________ Data is written to an odd address when WRH is held "L". _____ Data is read when RD is held "L". ______ ________ _____ WR, BHE and RD selected: ______ Data is written to external memory space when WR is held "L". _____ Data in an external memory space is read when RD is held "L". ________ An odd address is accessed when BHE is held "L". ______ ________ _____ Select WR, BHE and RD for external 8-bit data bus. ALE is a signal latching the address __________ The microcomputer is placed in a hold state while the HOLD pin is held "L" Outputs an "L" signal while the microcomputer is placed in a hold state ________ Bus is placed in a wait state while the RDY pin is held "L" VCC VSS AVCC AVSS ____________ RESET CNVSS BYTE D0 to D7 D8 to D15 A0 to A22 ______ A23 A0/D0 to A7/D7 A8/D8 to A15/D15 ______ ______ CS0 to CS3 ________ ______ WRL / WR _________ ________ WRH / BHE _____ RD ALE __________ HOLD __________ HLDA ________ RDY Power Supply Analog Power Supply Reset Input CNVSS Input to Switch External Data Bus Width(1) Bus Control Pins(1) I I I I I I/O I/O O O I/O I/O O O O I O I Classsfication Symbol I/O Type Function I : Input O : Output I/O : Input and output NOTES: 1. Bus control pins in M32C/86T cannot be used. 1.6 Pin Description Table 1.4 Pin Description |
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