參數(shù)資料
型號(hào)： M30101M3-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PDSO42
封裝： PLASTIC, SSOP-42
文件頁(yè)數(shù)： 53/125頁(yè)
文件大?。?/td> 1608K
代理商： M30101M3-XXXFP
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Oscillation Stop Detection
Under
development
Tentative Specifications REV.C1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30101/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
33
b7
b6
b5
b4
b3
b2
b1
b0
RW
CM20
CM21
CM22
CM23
0
00
0
Oscillation stop detection register (Note 5)
Symbol
Address
When reset
CM2
000C16
0416
Bit name
Function
Bit symbol
Main clock switch bit
Oscillation stop detection
interrupt enable bit
0: The function is invalid.
1: The function is valid.
0: Select XIN clock.
1: Select ring oscillator.
0: Disabled
1: Enabled
0: XIN oscillating normally
1: XIN stopping abnormally
Oscillation stop
detection bit
Clock monitor bit
Reserved bit
Always set to "0"
Note 1: Set to “0” before stopping the oscillation of the main clock (XIN-XOUT).
(stop mode, low power dissipation mode, ring oscillation mode)
An oscillation stop is detected if the oscillation of the main clock (XIN-XOUT) is
stopped when the following two conditions are satisfied: (1) the oscillation stop
detection function is valid and (2) CM21=1.
Note 2: Valid when CM20=1.
Note 3: CM22 bit switches to “1“ automatically if an oscillation stop is detected when
both CM20 bit and CM 21 bit are “1”. CM22 bit cannot be cleared when CM23=1.
Note 4: This bit is valid when both CM20 bit and CM 21 bit are “1”. Use this bit for the
purpose of confirming XIN operation for oscillation stop detection interrupt execution.
Note 5: In case of writing to this register, set bit 0 of the protect register(000A16) to "1".
(Note 3)
(Note 2)
(Note 1)
(Note 4)
fMAIN
CM22
CM21
Oscillation stop
detection interrupt
generating circuit
Charge/discharge
circuit
Ring oscillator
To the CPU
Watchdog
timer
interrupt
Main clock
Main clock switch control
To the main clock
division circuit
Compulsory discharge when CM20=0
Pulse generation
circuit for clock
edge detection
and charge/
discharge control
#:When XIN is supplied, this repeats charge and discharge with pulses by XIN edge detection.
When XIN is not supplied, this continues charging. When the charge exceeds a certain level,
it regards the oscillation as stopped.
CM14
(Note)
Note: As for the fMAIN, refer to Figure 1.8.3 clock generating circuit.
Figure 1.10.1. Oscillation stop detection circuit
Figure 1.10.2. Oscillation stop detection register
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