參數(shù)資料
型號： 16LF628A
廠商： Microchip Technology Inc.
元件分類： 8位微控制器
英文描述： FLASH-Based 8-Bit CMOS Microcontrollers
中文描述： 基于閃存的8位CMOS微控制器
文件頁數(shù)： 142/168頁
文件大?。?/td> 3760K
代理商： 16LF628A
PIC16F627A/628A/648A
DS40044A-page 140
Preliminary
2002 Microchip Technology Inc.
17.6
Timing Diagrams and Specifications
FIGURE 17-4:
EXTERNAL CLOCK TIMING
TABLE 17-4:
EXTERNAL CLOCK TIMING REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min
Typ
Max
Units
Conditions
Fosc
External CLKIN Frequency
(1)
DC
—
4
MHz XT and RC Osc mode,
V
DD
= 5.0 V
DC
—
20
MHz HS Osc mode
DC
—
200
kHz
LP Osc mode
Oscillator Frequency
(1)
—
—
4
MHz RC Osc mode, V
DD
= 5.0V
0.1
—
4
MHz XT Osc mode
1
—
—
—
20
200
MHz
kHz
HS Osc mode
LP Osc mode
—
4
—
MHz INTOSC mode (fast)
—
37
—
kHz
INTOSC mode (slow)
1
Tosc
External CLKIN Period
(1)
250
—
—
ns
XT and RC Osc mode
50
—
—
ns
μ
s
HS Osc mode
5
—
—
LP Osc mode
Oscillator Period
(1)
250
—
—
ns
RC Osc mode
250
—
10,000
ns
XT Osc mode
50
—
1,000
ns
μ
s
HS Osc mode
5
—
—
LP Osc mode
—
250
—
ns
μ
s
INTOSC mode (fast)
—
27
—
INTOSC mode (slow)
2
Tcy
Instruction Cycle Time
1.0
T
CY
DC
ns
T
CY
= 4/F
OSC
3
TosL,
TosH
External CLKIN (OSC1) High
External CLKIN Low
100*
—
—
ns
XT oscillator, T
OSC
L/H duty
cycle
4
RC
External Biased RC Fre-
quency
10 kHz*
—
4 MHz
—
V
DD
= 5.0V
*
These parameters are characterized but not tested.
Data in “Typ” column is at 5.0V, 25
°
C unless otherwise stated. These parameters are for design guidance only
and are not tested.
Note:
Instruction cycle period (Tcy) equals four times the input oscillator time-based period. All specified values
are based on characterization data for that particular oscillator type under standard operating conditions
with the device executing code. Exceeding these specified limits may result in an unstable oscillator oper-
ation and/or higher than expected current consumption. All devices are tested to operate at “Min” values
with an external clock applied to the OSC1 pin. When an external clock input is used, the “Max” cycle time
limit is “DC” (no clock) for all devices.
OSC1
CLKOUT
Q4
Q1
Q2
Q3
Q4
Q1
1
3
3
4
4
2
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