參數(shù)資料
型號: MC68HC05C8A
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 129/158頁
文件大?。?/td> 773K
代理商: MC68HC05C8A
Electrical Specifications
3.3-V Control Timing
MC68HC05C8A
MC68HCL05C8A
MC68HSC05C8A
Rev. 5.0
Technical Data
MOTOROLA
Electrical Specifications
129
13.10 3.3-V Control Timing
Figure 13-4. TCAP Timing Relationships
Characteristic
(1)
1. V
DD
= 3.3 Vdc
±
0.3 Vdc, V
SS
= 0 Vdc, T
A
=
40
°
C to +125
°
C, unless otherwise noted.
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.
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
.
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
.
Symbol
Min
Max
Unit
Oscillator frequency
Crystal
External clock
f
OSC
dc
2.0
2.0
MHz
Internal operating frequency
Crystal
External clock
f
OP
dc
1.00
1.00
MHz
Internal clock cycle time
t
CYC
1000
ns
Crystal oscillator startup time
t
OXOV
100
ms
Stop recovery startup time (crystal oscillator)
t
ILCH
100
ms
RESET pulse width
t
RL
1.5
t
CYC
Timer
Resolution
(2)
Input capture pulse width
Input capture pulse period
t
RESL
t
TH
, t
TL
t
TLTL
4.0
250
Note
(3)
t
CYC
ns
t
CYC
Interrupt pulse width low (edge-triggered)
t
ILIH
250
ns
Interrupt pulse period
t
ILIL
Note
(4)
t
CYC
OSC1 pulse width
t
OH,
t
OL
200
ns
t
TLTL
TCAP PIN
t
TH
t
TL
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