- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄67966 > MC68HC05BS8FB (MOTOROLA INC) 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PQFP44 PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68HC05BS8FB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁(yè)數(shù)： | 81/128頁(yè) |
| 文件大?。?/td> | 752K |
| 代理商： | MC68HC05BS8FB |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)當(dāng)前第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)
MOTOROLA
6-12
MC68HC05BS8
TIMERS
6
RTIF - Real Time Interrupt Flag
1 (set)
–
A real time interrupt has occurred.
0 (clear) –
A real time interrupt has not occurred.
When RTIF is set, a CPU interrupt request is generated if RTIE is set. The clock frequency that
drives the RTI circuit is E/1213. The RTI rate is selectable by the RT1 and RT0 bits. RTIF is cleared
by writing a “0” to the bit.
CTOFE - CTimer Overow Interrupt Enable
1 (set)
–
TOF interrupt is enabled.
0 (clear) –
TOF interrupt is disabled.
RTIE - Real Time Interrupt Enable
1 (set)
–
Real time interrupt is enabled.
0 (clear) –
Real time interrupt is disabled.
RT1, RT0 - Rate Select for COP watchdog and RTI
See Section 6.2.3 on COP watchdog reset.
6.2.3
COP Watchdog Reset
The COP (Computer Operating Properly) watchdog timer function is implemented by using the
output of the RTI selected output. The minimum COP reset rates are determined by RT0 and RT1
of CTimer Control and Status register. If the COP circuit times out, an internal reset is generated
and the reset vector is fetched (at $3FFE & $3FFF). Preventing a COP time-out is achieved by
periodically writing a “0” to bit 0 of address $3FF0.
The COP reset function is enabled after a reset, and can be disabled by writing a “0” to the COP
bit (bit 6) in the Option Register at address $001D. Once disabled, it cannot be enabled except by
a reset function. Also, STOP mode cannot be entered when the COP watchdog is enabled.
Table 6-1 COP Reset and RTI Rates
RT1
RT0
Bus Frequency, fOP=2.1MHz
Divide Ratio
Minimum RTI Rate
Minimum COP Reset Rate (RTI x 7)
1/(fOP/Divide Ratio/7)
00
214
7.81ms
54.7ms
01
215
15.6ms
109ms
10
216
31.2ms
219ms
11
217
62.5ms
438ms
RT0 and RT1 should only be changed immediately after COP watchdog timer has been reset.
TPG
54
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC705F4P | 8-BIT, OTPROM, 1.789 MHz, MICROCONTROLLER, PDIP28 |
| MC68HC705F4FB | 8-BIT, OTPROM, 1.789 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC05F4FB | 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC05F4CDW | 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDSO28 |
| MC68HC705G4 | 8-BIT, OTPROM, 1 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05C0CP | 制造商:Motorola Inc 功能描述: |
| MC68HC05C12 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12B | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12CP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
| MC68HC05C12P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。