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參數(shù)資料
| 型號(hào)： | M38D29GC-XXXFP |
| 元件分類(lèi)： | 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(yè)數(shù)： | 47/138頁(yè) |
| 文件大?。?/td> | 2880K |
| 代理商： | M38D29GC-XXXFP |
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Rev.3.02
Apr 10, 2008
Page 14 of 131
REJ03B0177-0302
38D2 Group
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit, etc.
This register is allocated at address 003B16.
After the system is released from reset, the mode depends on the
OSCSEL pin state in the QzROM version.
When the OSCSEL pin state is GND level, only the on-chip
oscillator starts oscillation. The XIN-XOUT oscillation stops
oscillating, and XCIN and XCOUT pins function as I/O ports. The
operating mode is the on-chip oscillator mode.
When the OSCSEL pin state is Vcc level, the XIN-XOUT
oscillation divided by 8 starts oscillation. The on-chip oscillator
stops oscillating, and the XCIN and XCOUT pins function as I/O
ports. The operating mode is the frequency/8 mode.
In the flash memory version, only the on-chip oscillator starts
oscillating. The XIN-XOUT oscillation stops oscillating, and the
XCIN and XCOUT pins function as I/O ports. The operating mode
is the on-chip oscillator mode.
When the main clock or sub-clock is used, after the XIN-XOUT
oscillation and the XCIN-XCOUT oscillation are enabled, wait in
the on-chip oscillator mode etc. until the oscillation stabilizes,
and then switch the operation mode.
When the main clock is not used (XIN-XOUT oscillation and an
external clock input are not used), connect the XIN pin to VCC
through a resistor and leave XOUT open.
[CPU Mode Register 2 (CPUM2)] 001116
The CPU mode register 2 contains the control bits for the on-chip
oscillator.
The CPU mode register 2 is allocated at address 001116.
Fig. 7 Structure of CPU mode register
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
0 1 :
1 0 :
1 1 :
Stack page selection bit
0 : 0 page
1 : 1 page
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 b6
0 0 : f(XIN)/2 (frequency/2 mode)
0 1 : f(XIN)/8 (frequency/8 mode)
1 0 : 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
Notes 1: When the on-chip oscillator is selected by the watchdog timer count source selection bit 2 (bit 5 of
watchdog timer control register (address 002916)), the on-chip oscillator does not stop
even when the on-chip oscillator stop bit is set to “1”.
Also, when the low-speed mode is set, the on-chip oscillator stops regardless of the value of this bit in
the QzROM version. 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 does not stop in the flash
memory version, but stops in the QzROM version.
2: In low-speed mode, the XCIN-XCOUT oscillation stops if the port XC switch bit is set to “0”.
3: In XIN mode, the XIN-XOUT oscillation does not stop even if the XIN-XOUT oscillation stop bit is set to “1”.
4: 12.5 MHz < f(XIN)
≤ 16 MHz is not available in the frequency/2 mode.
(1)
(4)
(2)
(3)
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| M38D58G8HP#U0 | 功能描述:IC 740/38D5 MCU QZ-ROM 80LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲(chǔ)器容量:- 程序存儲(chǔ)器類(lèi)型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線(xiàn)） 包裝:帶卷 (TR) |
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