參數(shù)資料
型號(hào)： M37544G2GP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP32
封裝： 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁(yè)數(shù)： 36/70頁(yè)
文件大?。?/td> 645K
代理商： M37544G2GP
7544 Group
Rev.1.04
2004.06.08
page 39 of 66
REJ03B0012-0104Z
Fig. 48 State transition
Stop mode
Wait mode
WIT
instruction
Oscillation stop detection circuit valid
CPUM4
← 12
MISRG1¨12
Interrupt
STP
instruction
WIT
instruction
Interrupt
MISRG1
← 02
CPUM3¨12
CPUM3
← 02
CPUM76¨102
CPUM76¨002
012
112
(Note 2)
CPUM4¨02
MISRG1¨12
MISRG1¨02
Reset released
State 1
Operation clock source:
f(XIN) (Note 1)
f(XIN) oscillation enabled
On-chip oscillator stop
State 2
Operation clock source:
f(XIN) (Note 1)
f(XIN) oscillation enabled
On-chip oscillator enabled
State 3
Operation clock source:
On-chip oscillator (Note 3)
f(XIN) oscillation enabled
On-chip oscillator enabled
State 4
Operation clock source:
On-chip oscillator (Note 3)
f(XIN) oscillation stop
On-chip oscillator enabled
Notes on switch of clock
(1) In operation clock source = f(XIN), the following can be
selected for the CPU clock division ratio.
● f(XIN)/2 (high-speed mode)
● f(XIN)/8 (middle-speed mode)
● f(XIN) (double-speed mode, only at a ceramic/quartz-crystal
oscillation)
(2) Execute the state transition state 3 to state 2 or
state 3’ to state 2’ after stabilizing XIN oscillation.
(3) In operation clock source = on-chip oscillator, the middle-
speed mode is selected for the CPU clock division ratio.
(4) When the state transition state 2
→ state 3 → state 4
is performed, execute the NOP instruction as shown below
according to the division ratio of CPU clock.
CPUM76
→ 102 (State 2 → state 3)
NOP instruction
CPUM4
→ 12 (State 3 → state 4)
Double-speed mode at on-chip oscillator: NOP 3
High-speed mode at on-chip oscillator: NOP 1
Middle-speed mode at on-chip oscillator: NOP
0
Reset state
CPUM76¨102
CPUM76
← 002
012
112
(Note 2)
State 2’
Operation clock source:
f(XIN) (Note 1)
f(XIN) oscillation enabled
On-chip oscillator enabled
State 3’
Operation clock source:
On-chip oscillator (Note 3)
f(XIN) oscillation enabled
On-chip oscillator enabled
相關(guān)PDF資料
PDF描述
M37544G2SP 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP32
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