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参数资料
| 型号： | M37544M2-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 36/70页 |
| 文件大小： | 645K |
| 代理商： | M37544M2-XXXSP |
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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
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| M37545G4GP#U0 | 功能描述:MCU 2/5V 16K 32-LQFP QZ-ROM RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
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