- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45218 > MC68HSC05C8CFB (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44 PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68HSC05C8CFB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | QFP-44 |
| 文件頁(yè)數(shù)： | 58/116頁(yè) |
| 文件大小： | 781K |
| 代理商： | MC68HSC05C8CFB |
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)當(dāng)前第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)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)
Timer
MC68HC05C8A MC68HCL05C8A MC68HSC05C8A Data Sheet, Rev. 5.1
46
Freescale Semiconductor
8.6 Timer Status Register
The timer status register (TSR) is a read-only register containing three status flag bits.
ICF — Input Capture Flag
1 = Flag set when selected polarity edge is sensed by input capture edge detector
0 = Flag cleared when TSR and input capture low register ($15) are accessed
OCF — Output Compare Flag
1 = Flag set when output compare register contents match the free-running counter contents
0 = Flag cleared when TSR and output compare low register ($17) are accessed
TOF — Timer Overflow Flag
1 = Flag set when free-running counter transition from $FFFF to $0000 occurs
0 = Flag cleared when TSR and counter low register ($19) are accessed
Bits 0–4 — Not used
Always read 0
Accessing the timer status register satisfies the first condition required to clear status bits. The remaining
step is to access the register corresponding to the status bit.
A problem can occur when using the timer overflow function and reading the free-running counter at
random times to measure an elapsed time. Without incorporating the proper precautions into software,
the timer overflow flag could unintentionally be cleared if:
1.
The timer status register is read or written when TOF is set.
2.
The LSB of the free-running counter is read but not for the purpose of servicing the flag.
The counter alternate register at addresses $1A and $1B contains the same value as the free-running
counter (at address $18 and $19); therefore, this alternate register can be read at any time without
affecting the timer overflow flag in the timer status register.
8.7 Timer During Wait Mode
The central processor unit (CPU) clock halts during wait mode, the timer remains active. If interrupts are
enabled, a timer interrupt will cause the processor to exit the wait mode.
8.8 Timer During Stop Mode
In stop mode, the timer stops counting and holds the last count value if stop is exited by an interrupt. If
reset is used, the counter is forced to $FFFC. During stop, if at least one valid input capture edge occurs
at the TCAP pin, the input capture detect circuit is armed. This does not set any timer flags or wake up
the microcontroller unit (MCU). But if the MCU exits stop due to an external interrupt, there is an active
input capture flag and data from the first valid edge that occurred during the stop mode. If reset is used
to exit stop mode, then no input capture flag or data remains, even if a valid input capture edge occurred.
Address:
$0013
Bit 7
654321
Bit 0
Read:
ICF
OCF
TOF
00000
Write:
Reset:
U
00000
= Unimplemented
U = Unaffected
Figure 8-4. Timer Status Register (TSR)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC05C8APE | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC05C8AMB | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42 |
| MC68HCL05C8AFN | 8-BIT, MROM, MICROCONTROLLER, PQCC44 |
| MC68HSC05C8AFB | 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC05C8AMFN | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HSC705C8ACFB | 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 304 BYTES RAM - Bulk |
| MC68HSC705C8ACP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
| MC68HSC705C8ACS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HSC705J1ACDW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HSC705J1ACP | 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 64 BYTES RAM - Bulk |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。