PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 161

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

15.5.2
FIGURE 15-4: EXTERNAL CLOCK TIMING
TABLE 15-5
Note 1: Instruction cycle period (T
Parameter
1999 Microchip Technology Inc.
CLKOUT
No.
OSC1
3*
4*
*
†
1
2
TIMING DIAGRAMS AND SPECIFICATIONS
These parameters are characterized but not tested.
Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
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 con-
sumption. All devices are tested to operate at "min." values with an external clock applied to the OSC1/CLKIN pin.
When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices.
TosR,
TosL,
TosH
Sym
Fosc
TosF
Tosc
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 based on
Q1
1
Advance Information
Q2
Min
250
250
250
250
250
200
100
DC
DC
DC
DC
DC
0.1
2.5
50
50
15
—
—
—
4
5
5
5
2
Typ†
T
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
CY
Q3
10,000
3
Max
200
200
250
250
DC
20
20
25
50
15
—
—
—
—
—
—
—
—
—
4
4
4
4
Units Conditions
MHz
MHz
MHz
MHz
MHz
MHz
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Q4
s
s
s
4
PIC16C77X
XT and RC osc mode
HS osc mode (-04)
HS osc mode (-20)
LP osc mode
RC osc mode
XT osc mode
HS osc mode
LP osc mode
XT and RC osc mode
HS osc mode (-04)
HS osc mode (-20)
LP osc mode
RC osc mode
XT osc mode
HS osc mode (-04)
HS osc mode (-20)
LP osc mode
T
XT oscillator
LP oscillator
HS oscillator
XT oscillator
LP oscillator
HS oscillator
CY
4
= 4/F
OSC
DS30275A-page 161
Q1