參數(shù)資料
型號： M30102M3-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù)： 94/166頁
文件大?。?/td> 2060K
代理商： M30102M3-XXXFP
Oscillation Stop Detection
Under
development
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 XIN 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 XIN 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 “112,” the function is enabled. After the reset is released, the
oscillation stop detection function becomes disabled because the bit value is “002.”
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
Specification
Oscillation stop detectable clock and
XIN
≥ 2 MHz
frequency bandwidth
Enabling condition for oscillation stop
When the oscillation stop detection bit (bit 0 of address 000C16)
detection function
and the oscillation stop detection interrupt enable bit (bit 1 of
address 000C16) 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 (XIN-XOUT), 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
(XIN-XOUT) 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 000616), oscillation stop will be detected.
Do not stop the peripheral function clock in WAIT mode.
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