參數(shù)資料
型號： M38D29GC-XXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 6.25 MHz, MICROCONTROLLER, PQFP64
封裝： 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁數(shù)： 101/138頁
文件大?。?/td> 2880K
代理商： M38D29GC-XXXFP
Rev.3.02
Apr 10, 2008
Page 63 of 131
REJ03B0177-0302
38D2 Group
Fig. 62 State transitions of system clock
Frequency/2 mode
CM4
XIN oscillation (frequency/2)
XCIN oscillation
OCO oscillation or stop
φ =f(XIN)/2
CM7=0
CM6=0
CM5=0
CM4=1
CM3=0 CM8=*
Frequency/8 mode
CM4
CM5
CM5
XIN stop
XCIN oscillation
OCO stop
φ =f(XCIN)/2
CM7=1 (invalid)
CM6=1 (invalid)
CM5=1
CM4=1
CM3=1 CM8=1
CM5
(CM7)
CM3, CM8
(6)
On-chip oscillator mode
Low-speed mode
(6)
CM7
(6)
CM7
XIN oscillation
XCIN oscillation
OCO stop
φ =f(XCIN)/2
CM7=0 (invalid)
CM6=1 (invalid)
CM5=0
CM4=1
CM3=1 CM8=1
XIN stop
XCIN oscillation
OCO oscillation
φ =f(OCO)/32
CM7=1
CM6=1
CM5=1
CM4=1
CM3=0 CM8=0
XIN oscillation
XCIN oscillation
OCO oscillation
φ =f(OCO)/32
CM7=1
CM6=1
CM5=0
CM4=1
CM3=0 CM8=0
XIN oscillation
XCIN stop
OCO oscillation
φ =f(OCO)/32
CM7=1
CM6=1
CM5=0
CM4=0
CM3=0 CM8=0
XIN stop
XCIN stop
OCO oscillation
φ =f(OCO)/32
CM7=1
CM6=1
CM5=1
CM4=0
CM3=0 CM8=0
CM3, CM7,
CM8
(6)
CM4
XIN oscillation (frequency/8)
XCIN oscillation
OCO oscillation or stop
φ =f(XIN)/8
CM7=0
CM6=1
CM5=0
CM4=1
CM3=0 CM8=*
XIN oscillation (frequency/8)
XCIN stop
OCO oscillation or stop
φ =f(XIN)/8
CM7=0
CM6=1
CM5=0
CM4=0
CM3=0 CM8=*
CM6
Reset release
Frequency/4 mode
CM4
XIN oscillation (frequency/4)
XCIN oscillation
OCO oscillation or stop
φ =f(XIN)/4
CM7=1
CM6=0
CM5=0
CM4=1
CM3=0 CM8=*
XIN oscillation
XCIN oscillation
OCO stop
φ =f(XCIN)/2
CM7=0 (invalid)
CM6=0 (invalid)
CM5=0
CM4=1
CM3=1 CM8=1
XIN oscillation
XCIN oscillation
OCO stop
φ =f(XCIN)/2
CM7=1 (invalid)
CM6=0 (invalid)
CM5=0
CM4=1
CM3=1 CM8=1
CM6
XIN oscillation (frequency/2)
XCIN stop
OCO oscillation or stop
φ =f(XIN)/2
CM7=0
CM6=0
CM5=0
CM4=0
CM3=0 CM8=*
XIN oscillation (frequency/4)
XCIN stop
OCO oscillation or stop
φ =f(XIN)/4
CM7=1
CM6=0
CM5=0
CM4=0
CM3=0 CM8=*
* : The OCO oscillating at “0”; the OCO stopped at “1”.
CM6
CM7
CM3
CM6
CM7
CM3
CM6
(CM7)
CM6
CM5
(CM7)
CM6
CM5
CM3
Notes 1: Switchthemodeby the arrows shownbetweenthemodeblocks.
Theall modescan be switched to thestopmodeor the wait mode.
2: Timer and LCD operate in the wait mode. System is returned to the
source mode when the wait mode is ended.
3: The CM4 value is retained in the stop mode. When the stop mode is
ended, the operation mode varies as follows:
In the QzROM version: Mode set by the OSCSEL pin state
In the flash memory version: On-chip oscillator mode
The input level applied to the OSCSEL pin is determined when executing
the STP instruction.
4: Before executing the STP instruction, set the values to generate the
wait time required for oscillation stabilization to timer 1 and timer 2, and
set to "0" (interrupts disabled) to the interrupt enable bits of timer 1
and timer 2.
5: Execute the transition after the oscillation used in the destination mode
is stabilized.
6: When system goes to on-chip oscillator mode, the oscillation stabilizing
wait time is not needed.
7: The on-chip oscillator can be stopped in all kinds of state of frequency/
2,4 mode.
8:In all XIN mode, stop of on-chip oscillator is enabled.
9: The example assumes that 8 MHz is being applied to the XIN pin and 32
kHz to the XCIN pin. f(OCO) indicates the oscillation frequency of on-
chip oscillator.
10: When selecting the on-chip oscillator for the WDT clock, the on-chip
oscillator does not stop.
Also, in low-speed mode, the on-chip oscillator stops in the QzROM
version regardless of the on-chip oscillator stop bit value. The on-chip
oscillator does not stop in the flash memory version, so set this bit to
"1" to stop the oscillation.
In on-chip oscillator mode, even if this bit is set to "1", the on-chip
oscillator oscillation does not stop in the flash memory version, but
stops in the QzROM version.
11: In low-speed mode, the XCIN-XCOUT oscillation stops if the port XC
switch bit is set to "0".
12:In XIN mode, the XIN-XOUT oscillation does not stop even if the XIN-
XOUT oscillation stop bit is set to "1".
13: 12.5 MHz
< f(XIN) ≤ 16 MHz is not available in the frequency/2 mode.
14: In the flash memory version, set the on-chip oscillator stop bit to "1"
(oscillation stops) because OCO is in the state set by the setting value
of the on-chip oscillator stop bit.
On-chip oscillator stop bit
0:Oscillating
1 : Stopped
Not used (do not write “1”)
Not used
(returns “0” when read)
Not used (do not write “1”)
Processor mode bits
b1 b0
0 0 : Single-chip mode
01 :
10 :
11 :
Stack page selection bit
0: 0page
1: 1page
Internal system clock selection bit
0 : Main clock selected
(includes OCO, XIN)
1: XCIN
–XCOUT selected
Port Xc switch bit
0 : I/O port function (Oscillation stop)
1: XCIN
–XCOUT oscillating function
XIN
–XOUT oscillation stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bit
(Valid only when CM3=0)
b7 b8
00 : f(XIN)/2 (frequency/2 mode)
01 : f(XIN)/8 (frequency/8 mode)
10 : f(XIN)/4 (frequency/4 mode)
1 1 : On-chip oscillator
b7
b0
CPU mode register 2
CPUM2
(address 001116, QzROM version, OSCSEL=L,
initial value: 0016)
(
QzROM version, OSCSEL=H,
initial value: 0116)
(
Flash memory version,
initial value: 0016)
CM8
b7
b0
CPU mode register
CPUM
(address 003B16, QzROM version, OSCSEL=L,
initial value: E016)
(
QzROM version, OSCSEL=H,
initial value: 4016)
(
Flash memory version,
initial value: E016)
CM0
CM1
CM2
CM3
CM4
CM5
CM6
CM7
Not available
(13)
QzROM version
Flash memory version
OSCSEL=L
QzROM version
OSCSEL=H
(14)
(12)
(11)
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