參數(shù)資料
型號： M30100
廠商： Renesas Technology Corp.
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)： 31/164頁
文件大?。?/td> 3302K
代理商： M30100
Oscillation Stop Detection
deveopment
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
30
Oscillation Stop Detection Function
The oscillation stop detection function detects abnormal stopping of the main clock by causes such as
opening and shorting of the X
IN
oscillation circuit. When oscillation stop is detected, an oscillation stop
detection interrupt is issued. When an oscillation stop detection interrupt is issued, the ring oscillator in the
microcomputer operates automatically and is used as the main clock in place of the X
IN
clock. This allows
interrupt processing.
The oscillation stop detection function can be enabled/disabled with bit 0 and bit 1 of the oscillation stop
detection register. When this bit is set to “11
2
,” the function is enabled. After the reset is released, the
oscillation stop detection function becomes disabled because the bit value is “00
2
.”
Table 1.10.1 gives an specification overview of the oscillation stop detection function, Figure 1.10.2 is a
configuration diagram of the oscillation stop detection circuit and Figure 1.10.3 shows the configuration of
the oscillation stop detection register.
Table 1.10.1. Specification overview of the oscillation stop detection function
Item
Oscillation stop detectable clock and
X
IN
≥
2 MHz
frequency bandwidth
Enabling condition for oscillation stop
When the oscillation stop detection bit (bit 0 of address 000C
16
)
detection function
and the oscillation stop detection interrupt enable bit (bit 1 of
address 000C
16
) are set to “1”
Operation at oscillation stop detection
Oscillation stop detection interrupt occurs
Notes on STOP mode, low power
Before stopping the main clock (X
IN
-X
OUT
), set the
dissipation mode, and ring oscillator
oscillation stop detection enable bit to “0” to disable the
mode
oscillation stop detection function. Enable main clock
(X
IN
-X
OUT
) oscillation and after the oscillation stabilizes,
set the bit to “1” again.
Notes on WAIT mode
If the peripheral function clock is stopped in WAIT mode
with the WAIT mode peripheral function clock stop bit
(bit 2 of the address 0006
16
), oscillation stop will be detected.
Do not stop the peripheral function clock in WAIT mode.
Specification
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