参数资料
型号: PIC16C662T-20I/L
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 135/136页
文件大小: 634K
代理商: PIC16C662T-20I/L
PIC16C64X & PIC16C66X
DS30559A-page 98
Preliminary
1996 Microchip Technology Inc.
12.5
Timing Diagrams and Specications
FIGURE 12-2: EXTERNAL CLOCK TIMING
TABLE 12-4:
EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ
Max
Units
Conditions
Fosc
External CLKIN Frequency(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 (1)
DC
4
MHz
RC osc mode, VDD = 5.0V
0.1
4
MHz
XT osc mode
4
20
MHz
HS osc mode
5
200
kHz
LP osc mode
1
Tosc
External CLKIN Period(1)
250
ns
XT and RC osc mode
50
ns
HS osc mode
5—
s
LP osc mode
Oscillator Period(1)
250
ns
RC osc mode
250
10,000 ns
XT osc mode
50
250
ns
HS osc mode
5—
s
LP osc mode
2TCY
Instruction Cycle Time(1)
200
DC
ns
TCY = FOSC/4
3*
TosL,
TosH
External Clock in (OSC1)
High or Low Time
100
ns
XT osc mode
2.5
s
LP osc mode
15
ns
HS osc mode
4*
TosR,
TosF
External Clock in (OSC1)
Rise or Fall Time
25
ns
XT osc mode
50
ns
LP osc mode
15
ns
HS osc mode
* 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
13
3
44
2
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