參數(shù)資料
型號: M30240F7
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數(shù): 22/142頁
文件大?。?/td> 1637K
代理商: M30240F7
1-22
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV. E
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.
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 f(X
IN
) 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 1.9 shows an example of a reset circuit. Figure 1.10 shows the reset sequence.
.
Figure 1.9:
Reset circuit
Figure 1.10: Reset sequence
RESET
V
CC
0.8V
RESET
V
CC
0V
0V
5V
5V
4.0V
Example when V
CC
= 5V
.
Address
Content of reset vector
Internal clock
F
24 cycles
FFFFE
16
X
IN
RESET
FFFFC
16
At least 20 cycles are needed
Internal clock
F
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