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參數(shù)資料
| 型號(hào)： | M30245MC-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 164/244頁(yè) |
| 文件大?。?/td> | 3535K |
| 代理商： | M30245MC-XXXGP |
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Specifications in this manual are tentative and subject to change
Rev. E
MITSUBISHI MICROCOMPUTERS
M30245 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
26
Processor Mode
Processor Modes
One of three processor modes can be selected: single-chip mode, memory expansion mode, and microproces-
sor mode. The functions of some pins, the memory map, and the access space differ according to the selected
processor mode. Figure 1.10 shows the processor mode register 0 and 1.
Single-chip mode
In single-chip mode, only internal memory space (SFR, internal RAM, and internal ROM) can be accessed.
Ports P0 to P10 can be used as programmable I/O ports or as I/O ports for the internal peripheral func-
tions.
Memory expansion mode
In memory expansion mode, external memory can be accessed in addition to the internal memory space
(SFR, internal RAM, and internal ROM). However, if microprocessor mode is set (“H” applied to CNVss
pin) when coming out of a reset, the internal ROM cannot be accessed even if the CPU shifts to memory
expansion mode.
In memory expansion mode, some of the pins function as the address bus, the data bus, and as control
signals. The number of pins assigned to these functions depends on the bus and register settings. (See
“Bus Settings” for details.)
Microprocessor mode
In microprocessor mode, the SFR, internal RAM, and external memory space can be accessed. How-
ever, the internal ROM area cannot be accessed.
In this mode, some of the pins function as the address bus, the data bus, and as control signals. The
number of pins assigned to these functions depends on the bus and register settings. (See “Bus Settings”
for details).
Setting Processor Modes
The processor mode is set using the CNVss pin and the processor mode bits (bits 1 and 0 at address
000416). Do not set the processor mode bits to “102”.
Regardless of the level of the CNVss pin, changing the processor mode bits selects the mode. Therefore,
never change the processor mode bits when changing the contents of other bits. Also do not attempt to
change to or from microprocessor mode within the program stored in the internal ROM area.
Applying Vss to CNVss pin
The microcomputer begins operation in single-chip mode after being reset. Memory expansion mode is
selected by writing “012” to the processor mode bits in the Processor Mode register 0 (000416).
Applying Vcc to CNVss pin
The microcomputer starts to operate in microprocessor mode after being reset.
Figure 1.11 shows the applicable memory maps for each mode when memory area does not expand
(normal mode). Figure 1.12 shows the memory maps and chip-select areas in normal mode.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M30245FCGP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100 |
| M30621FCAGP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP80 |
| M30625MGM-XXXGP | 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP80 |
| M30621MCM-XXXGP | 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP80 |
| M30621FCMGP | 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M30245MG | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245MGGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245MG-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245MG-XXXGF | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245MG-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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