參數(shù)資料
型號： MC68HC705K1
廠商： 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述： HCMOS Microcontroller Unit
中文描述： HCMOS微控制器
文件頁數(shù)： 126/140頁
文件大?。?/td> 803K
代理商： MC68HC705K1
Technical Data
MC68HC705K1 — Rev. 2.0
Electrical Specifications
For More Information On This Product,
Go to: www.freescale.com
Electrical Specifications
12.10 5.0-Volt Control Timing
Characteristic
(1)
1. V
DD
= 5.0 Vdc
±
10%; V
SS
–0 Vdc; T
A
= T
L
to T
H
2. Use only AT-cut crystals.
3. Minimum oscillator frequency with RC oscillator option is limited only by size of external R and C and leakage of external C.
4. Including processing tolerances and variations in temperature and supply voltage. Excluding tolerances of external R
and C.
5. The 2-bit timer prescaler is the limiting factor in determining timer resolution.
6. The minimum period, t
ILIL
or t
IHIH
, should not be less than the number of cycles it takes to execute the interrupt service
routine plus 19 t
CYC
.
7. t
EPGM
is programming time per byte and may be accumulated during multiple programming passes.
Symbol
Min
Max
Unit
Oscillator frequency
3-pin RC oscillator
2-pin RC oscillator
Crystal/ceramic resonator
(2)
External clock
f
OSC
(3)
(3)
0.500
dc
1.2
2.4
4.0
4.0
MHz
Internal operating frequency (f
OSC
÷
2)
3-pin RC oscillator
2-pin RC oscillator
Crystal/ceramic resonator
External clock
f
OP
(3)
(3)
0.250
dc
0.6
1.2
2.0
2.0
MHz
2-pin RC oscillator frequency combined stability
(4)
f
OSC
= 2.0 MHz; V
DD
= 5.0 Vdc
±
10%; T
A
= –40
°
C to +85
°
C
f
OSC
= 2.0 MHz; V
DD
= 5.0 Vdc
±
10%; T
A
= 0
°
C to +40
°
C
f
OSC
—
—
±
25
±
20
%
3-pin RC oscillator frequency combined stability
(4)
f
OSC
= 1.0 MHz; V
DD
= 5.0 Vdc
±
10%; T
A
= –40
°
C to +85
°
C
f
OSC
= 1.0 MHz; V
DD
= 5.0 Vdc
±
10%; T
A
= 0
°
C to +40
°
C
Cycle time (1
÷
f
OP
)
f
OSC
—
—
±
15
±
10
%
t
CYC
500
—
ns
RC oscillator stabilization time
t
RCON
—
1
ms
Crystal oscillator startup time
t
OXON
—
100
ms
Stop recovery startup time
t
ILCH
—
100
ms
RESET pulse width low
t
RL
1.5
—
t
CYC
Timer resolution
(5)
t
RESL
4.0
—
t
CYC
IRQ interrupt pulse width low (edge-triggered)
t
ILIH
250
—
ns
IRQ interrupt pulse period
t
ILIL
(6)
—
t
CYC
PA3–PA0 interrupt pulse width high (edge-triggered)
t
IHIL
250
—
ns
PA3–PA0 interrupt pulse period
t
IHIH
(6)
—
t
CYC
OSC1 pulse width
t
OH
, t
OL
200
—
ns
Programming time per byte
(7)
t
EPGM
10
15
ms
F
Freescale Semiconductor, Inc.
n
.
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