參數(shù)資料
型號(hào): MC68HC705C9ACFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 118/118頁
文件大?。?/td> 750K
代理商: MC68HC705C9ACFB
3.3-Vdc Control Timing
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
99
12.8 3.3-Vdc Control Timing
Figure 12-4. TCAP Timing Relationships
Characteristic(1)
1. V
DD = 3.3Vdc ± 0.3 Vdc, VSS = 0 Vdc, TA = –40 to +85°C, unless otherwise noted
Symbol
Min
Max
Unit
Frequency of operation
Crystal
External clock
fOSC
DC
2.0
MHz
Internal operating frequency (fOSC ÷ 2)
Crystal
External clock
fOP
DC
1.0
MHz
Cycle time
tCYC
1000
ns
Crystal oscillator startup time
tOXOV
—100
ms
Stop recovery startup time (crystal oscillator)
tILCH
—100
ms
RESET pulse width
tRL
1.5
tCYC
Timer
Resolution(2)
Input capture pulse width
Input capture pulse period
2. Because a 2-bit prescaler in the timer must count four internal cycles (t
CYC), this is the limiting minimum factor in determining
the timer resolution.
tRESL
tTH, tTL
tTLTL
4.0
125
(3)
3. The minimum period t
TLTL should not be less than the number of cycle times it takes to execute the capture interrupt service
routine plus 24 t
CYC.
tCYC
ns
tCYC
Interrupt pulse width low (edge-triggered)
tILIH
250
ns
Interrupt pulse period
tILIL
(4)
4. The minimum t
ILIL should not be less than the number of cycle times it takes to execute the interrupt service routine plus
19 t
CYC.
tCYC
OSC1 pulse width
tOH,tOL
200
ns
t
TLTL
*
TCAP PIN
t
TH
*
t
TL
*
* Refer to timer resolution data in 12.7 5.0-Vdc Control Timing and 12.8 3.3-Vdc Control Timing.
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