PIC16C620 Microchip Technology, PIC16C620 Datasheet - Page 87

• Manufacturer Part Number: PIC16C620
• Description: EPROM-Based 8-Bit CMOS Microcontroller
• Manufacturer: Microchip Technology

12.6
FIGURE 12-2: EXTERNAL CLOCK TIMING
TABLE 12-4:
Note 1: Instruction cycle period (T
Parameter
1998 Microchip Technology Inc.
*
†
No.
3*
4*
1
2
CLKOUT
OSC1
Timing Diagrams and Specifications
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.
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 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.
TosR,
TosL,
TosH
Sym
TosF
Tosc
Fos
T
CY
EXTERNAL CLOCK TIMING REQUIREMENTS
Characteristic
External CLKIN Frequency
(Note 1)
Oscillator Frequency
(Note 1)
External CLKIN Period
(Note 1)
Oscillator Period
(Note 1)
Instruction Cycle Time (Note 1)
External Clock in (OSC1) High or
Low Time
External Clock in (OSC1) Rise or
Fall Time
Q4
CY
) equals four times the input oscillator time-base period. All specified values are
Q1
1
Preliminary
Q2
100*
Min
250
250
250
DC
DC
DC
DC
DC
20*
25*
50*
15*
0.1
1.0
50
50
2*
1
5
5
2
Fosc/4
Typ†
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
–
3
Q3
10,000
1,000
3
Max
200
200
DC
20
20
—
—
—
—
—
—
—
—
—
—
—
4
4
4
Units Conditions
MHz XT and RC osc mode, V
MHz HS osc mode
MHz RC osc mode, V
MHz XT osc mode
MHz HS osc mode
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
s
Q4
4
LP osc mode
LP osc mode
XT and RC osc mode
HS osc mode
LP osc mode
RC osc mode
XT osc mode
HS osc mode
LP osc mode
T
XT oscillator, T
LP oscillator, T
HS oscillator, T
cycle
XT oscillator
LP oscillator
HS oscillator
PIC16C62X
CYS
4
=F
OSC
Q1
/4
DS30235G-page 87
OSC
OSC
OSC
DD
L/H duty cycle
L/H duty cycle
=5.0V
L/H duty
DD
=5.0V