參數(shù)資料
型號(hào)： 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(jī)
文件頁數(shù)： 32/164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
31
b7
0
b6
0
b5
0
b4
0
b3
b2
b1
b0
R W
CM20
CM21
CM22
CM23
Oscillation stop detection register (Note 5)
Symbol
CM2
Address
000C
16
When reset
04
16
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 X
IN
clock.
1: Select ring oscillator.
0: Disabled
1: Enabled
0: X
IN
oscillating normally
1: X
IN
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 (X
IN
-X
OUT
).
(stop mode, low power dissipation mode, ring oscillation mode)
An oscillation stop is detected if the oscillation of the main clock (X
IN
-X
OUT
) 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
X
IN
operation for oscillation stop detection interrupt execution.
Note 5: In case of writing to this register, set bit 0 of the protect register(000A
16
) to "1".
(Note 3)
(Note 2)
(Note 1)
(Note 4)
f
MAIN
(Note)
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 X
IN
is supplied, this repeats charge and discharge with pulses by X
IN
edge detection.
When X
IN
is not supplied, this continues charging. When the charge exceeds a certain level,
it regards the oscillation as stopped.
CM14
Note: As for the f
MAIN
, 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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