參數(shù)資料
型號: PIC16C620A-20/P301
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP18
封裝: 0.300 INCH, PLASTIC, DIP-18
文件頁數(shù): 95/108頁
文件大?。?/td> 674K
代理商: PIC16C620A-20/P301
1998 Microchip Technology Inc.
Preliminary
DS30235G-page 87
PIC16C62X
12.6
Timing Diagrams and Specications
FIGURE 12-2: EXTERNAL CLOCK TIMING
TABLE 12-4:
EXTERNAL CLOCK TIMING REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min
Typ
Max
Units Conditions
Fos
External CLKIN Frequency
(Note 1)
DC
4
MHz
XT and RC osc mode, VDD=5.0V
DC
20
MHz
HS osc mode
DC
200
kHz
LP osc mode
Oscillator Frequency
(Note 1)
DC
4
MHz
RC osc mode, VDD=5.0V
0.1
4
MHz
XT osc mode
1
20
MHz
HS osc mode
DC
200
kHz
LP osc mode
1
Tosc
External CLKIN Period
(Note 1)
250
ns
XT and RC osc mode
50
ns
HS osc mode
5
s
LP osc mode
Oscillator Period
(Note 1)
250
ns
RC osc mode
250
10,000
ns
XT osc mode
50
1,000
ns
HS osc mode
5
s
LP osc mode
2
TCY
Instruction Cycle Time (Note 1)
1.0
Fosc/4
DC
s
TCYS=FOSC/4
3*
TosL,
TosH
External Clock in (OSC1) High or
Low Time
100*
ns
XT oscillator, TOSC L/H duty cycle
2*
s
LP oscillator, TOSC L/H duty cycle
20*
ns
HS oscillator, TOSC L/H duty
cycle
4*
TosR,
TosF
External Clock in (OSC1) Rise or
Fall Time
25*
ns
XT oscillator
50*
ns
LP oscillator
15*
ns
HS oscillator
*
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 1: Instruction cycle period (TCY) equals four times the input oscillator time-base period. All specied values are
based on characterization data for that particular oscillator type under standard operating conditions with the
device executing code. Exceeding these specied limits may result in an unstable oscillator operation
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
4
2
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