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: PLASTIC, LQFP-48
文件頁數(shù): 89/163頁
文件大?。?/td> 2767K
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
31
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 CM20 bit is “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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