PIC16F684
15.6 AC Characteristics: PIC16F684 (Industrial, Extended)
FIGURE 15-3:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
4
Q1
OSC1
1
3
3
4
2
CLKOUT
TABLE 15-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C ≤ TA ≤ +125°C
Param
No.
Sym
Characteristic
Min Typ†
Max
Units
Conditions
FOSC External CLKIN Frequency(1) DC
—
—
—
—
—
4
37
4
kHz LP Oscillator mode
MHz XT Oscillator mode
MHz HS Oscillator mode
MHz EC Oscillator mode
kHz LP Oscillator mode
MHz INTOSC mode
DC
DC
DC
20
20
37
—
4
Oscillator Frequency(1)
5
—
DC
0.1
1
—
—
—
—
—
—
—
MHz RC Oscillator mode
MHz XT Oscillator mode
MHz HS Oscillator mode
µs LP Oscillator mode
ns HS Oscillator mode
ns EC Oscillator mode
ns XT Oscillator mode
µs LP Oscillator mode
ns INTOSC mode
4
20
∞
1
TOSC
External CLKIN Period(1)
Oscillator Period(1)
27
50
∞
50
∞
250
27
∞
200
—
—
—
250
—
250
250
50
ns RC Oscillator mode
ns XT Oscillator mode
ns HS Oscillator mode
ns TCY = 4/FOSC
—
10,000
1,000
DC
—
2
3
TCY
Instruction Cycle Time(1)
200
TCY
—
TosL, External CLKIN (OSC1) High 2*
—
µs LP oscillator, TOSC L/H duty cycle
ns HS oscillator, TOSC L/H duty cycle
ns XT oscillator, TOSC L/H duty cycle
ns LP oscillator
TosH External CLKIN Low
20*
100 *
—
—
—
—
—
4
TosR, External CLKIN Rise
TosF External CLKIN Fall
—
50*
25*
15*
—
—
ns XT oscillator
—
—
ns HS oscillator
*
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.
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values
are 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 OSC1 pin. When an external clock input is used, the ‘max’ cycle
time limit is ‘DC’ (no clock) for all devices.
2004 Microchip Technology Inc.
Preliminary
DS41202C-page 137
MICROCHIP [ MICROCHIP ]
