16F876 Microchip Technology, 16F876 Datasheet - Page 159

• Manufacturer Part Number: 16F876
• Description: 28/40-pin 8-Bit CMOS FLASH Microcontrollers
• Manufacturer: Microchip Technology

FIGURE 15-5: EXTERNAL CLOCK TIMING
TABLE 15-1:
Legend: † Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
Note 1: Instruction cycle period (T
Parameter
1999 Microchip Technology Inc.
CLKOUT
No.
1
2
3
4
OSC1
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/CLKIN pin. When an external clock input is used, the "Max." cycle time limit is
"DC" (no clock) for all devices.
only and are not tested.
TosR,
F
TosL,
T
TosH
Sym Characteristic
TosF
T
OSC
OSC
CY
EXTERNAL CLOCK TIMING REQUIREMENTS
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
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
Max
3
200
200
250
250
DC
20
20
25
50
15
—
—
—
—
—
—
—
—
—
4
4
4
4
Units Conditions
MHz XT and RC osc mode
MHz HS osc mode (-04)
MHz HS osc mode (-20)
MHz RC osc mode
MHz XT osc mode
MHz
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Q4
s
s
s
4
PIC16F87X
LP 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
DS30292B-page 159
Q1