參數(shù)資料
型號(hào)： M30302MA-XXXGP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, PLASTIC, QFP-100
文件頁數(shù)： 46/177頁
文件大?。?/td> 2355K
代理商： M30302MA-XXXGP
Mitsubishi microcomputers
M16C / 30 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Reset
14
Figure 1.5.2. Reset sequence
Reset
There are two kinds of resets; hardware and software. In both cases, operation is the same after the reset.
(See “Software Reset” for details of software resets.) This section explains on hardware resets.
When the supply voltage is in the range where operation is guaranteed, a reset is effected by holding the
reset pin level “L” (0.2VCC max.) for at least 20 cycles. When the reset pin level is then returned to the “H”
level while main clock is stable, the reset status is cancelled and program execution resumes from the
address in the reset vector table.
The RAM is undefined at power on. The initial value must therefore be set. When a reset signal is applied
while the CPU is writing a value to the RAM, the value may be set as unknown due to the termination of the
CPU access.
Figure 1.5.1 shows the example reset circuit. Figure 1.5.2 shows the reset sequence.
Figure 1.5.1. Example reset circuit
BCLK
Address
Microprocessor
mode BYTE = “H”
Microprocessor
mode BYTE = “L”
Content of reset vector
Single chip
mode
BCLK
24cycles
FFFFC16
FFFFD16
FFFFE16
Content of reset vector
FFFFC16
FFFFE16
Content of reset vector
FFFFE16
XIN
RESET
RD
WR
CS0
RD
WR
CS0
FFFFC16
More than 20 cycles are needed
RESET
VCC
0.8V
RESET
VCC
0V
5V
4.0V
Example when VCC = 5V
.
More than 20 cycles of XIN are needed.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M30302MC 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M30302MCL-XXX 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M30302MCL-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M30302MCL-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M30302MCP-XXX 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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