PIC12F629/675
12.9 AC CHARACTERISTICS: PIC12F629/675 (INDUSTRIAL, EXTENDED)
FIGURE 12-5:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
4
Q1
OSC1
1
3
4
3
2
CLKOUT
TABLE 12-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
Sym
Characteristic
Min Typ†
Max
Units
Conditions
No.
FOSC External CLKIN Frequency(1) DC
—
—
—
—
—
4
37
4
kHz LP Osc mode
MHz XT mode
DC
DC
DC
20
20
37
—
4
MHz HS mode
MHz EC mode
Oscillator Frequency(1)
5
kHz LP Osc mode
MHz INTOSC mode
MHz RC Osc mode
MHz XT Osc mode
MHz HS Osc mode
—
DC
0.1
1
—
—
—
4
20
1
TOSC
External CLKIN Period(1)
Oscillator Period(1)
27
50
—
—
—
—
200
—
s LP Osc mode
ns HS Osc mode
ns EC Osc mode
ns XT Osc mode
s LP Osc mode
ns INTOSC mode
ns RC Osc mode
ns XT Osc mode
ns HS Osc mode
50
250
27
—
250
—
250
250
50
—
—
10,000
1,000
—
Instruction Cycle Time(1)
200
TCY
—
DC
—
ns TCY = 4/FOSC
2
3
TCY
TosL, External CLKIN (OSC1) High 2*
s LP oscillator, TOSC L/H duty cycle
TosH External CLKIN Low
20*
—
—
ns HS oscillator, TOSC L/H duty
cycle
100 *
—
—
—
—
—
—
ns XT oscillator, TOSC L/H duty cycle
ns LP oscillator
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.
DS41190G-page 96
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
