參數(shù)資料
型號(hào)： M30240M4-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, MICROCONTROLLER, PQFP80
封裝： 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)： 39/125頁
文件大小： 753K
代理商： M30240M4-XXXFP
CONFIDENTIAL
22
Mitsubishi microcomputers
M16C / 24 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change
Reset
2.5 Reset
There are two types of resets: hardware and software. In both cases, operation is the same after the
reset. (See “Software Reset” for further details regarding software resets.) This section explains on
hardware resets.
Note:
The USB peripheral is only reset during a hardware reset; software resets do not affect the
USB peripheral.
When the supply voltage is within the range where operation is guaranteed, a reset is effected by holding
the reset pin level “L” (0.2VCC max.) for at least 20 XIN 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.
Figure 9 shows an example of a reset circuit. Figure 10 shows the reset sequence.
.
Figure 9:
Reset circuit
Figure 10:
Reset sequence
RESET
VCC
0.8V
RESET
VCC
0V
5V
4.0V
Example when f(XIN) = 10MHz and VCC = 5V
.
BCLK
Address
Microprocessor
mode BYTE = “H”
Content of reset vector
Single chip
mode
BCLK
24cycles
FFFFE16
XIN
RESET
FFFFC16
At least 20 cycles are needed
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