- 您現在的位置：買賣IC網 > PDF目錄369230 > 68HC705BD7 (Motorola, Inc.) 8-Bit Microcontroller Units (MCU).(8位微控制器) PDF資料下載
參數資料
| 型號： | 68HC705BD7 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數： | 37/85頁 |
| 文件大小： | 302K |
| 代理商： | 68HC705BD7 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁當前第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
SECTION 5: RESETS
MOTOROLA
Page 27
MC68HC05BD7 Rev. 2.0
GENERAL RELEASE SPECIFICATION
voltage (brown-out). There is an oscillator stabilization delay of 4065 internal processor bus
clock cycles (PH2) after the oscillator becomes active.
SECTION 5
RESETS
The MCU can be reset from four sources—1 external and 3 internal:
External RESET pin
Power-On-Reset (POR)
Computer Operating Properly Watchdog Reset (COPR)
Illegal Address Reset (ILADR)
5.1
External Reset (RESET)
The RESET pin is the only external reset source. This pin is connected to a Schmitt trigger
input gate to provide an upper and lower threshold voltage separated by a minimum
amount of hysteresis. This external reset occurs whenever the RESET pin is pulled below
the lower threshold and remains in reset until the RESET pin rises above the upper
threshold. This active low input will generate the RST signal and reset the CPU and
peripherals. Termination of the external RESET input can alter the operating mode of the
MCU.
NOTE:
Activation of the RST signal is generally referred to as reset of the device,
unless otherwise specified.
5.2
Internal Resets
The three internally generated resets are the initial power-on reset, the COP Watchdog
Timer reset, and the illegal address reset
5.2.1
Power-On Reset (POR)
The internal POR is generated on power-up to allow the clock oscillator to stabilize. The
POR is strictly for power-on condition and is not able to detect a drop in the power supply
The POR will generate the RST signal which will reset the CPU. If any other reset function
is active at the end of this 4065 cycles delay, the RST signal will remain in the reset
condition until the other reset condition(s) end.
5.2.2
Computer Operating Properly Reset (COPR)
The internal COPR reset is generated automatically (if enabled) by a time-out of the COP
Watchdog Timer. This time-out occurs if the counter in the COP Watchdog Timer is not
reset (cleared) within a specific time by a program reset sequence. Refer to
SECTION 11
for more information on this time-out feature.
相關PDF資料 |
PDF描述 |
|---|---|
| 68HC05J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HC705J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HRC05J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HRC705J5A | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HC05K0 | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 68HC705C5 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION(General Release) |
| 68HC705C8 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PROGRAMMING REFRERENCE GUIDE |
| 68HC705C8ACP | 制造商: 功能描述: 制造商:Motorola Inc 功能描述: 制造商:undefined 功能描述: |
| 68HC705CJ4FB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| 68HC705CJ4P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
發布緊急采購，3分鐘左右您將得到回復。