PIC12F629/675
12.9 AC CHARACTERISTICS: PIC12F629/675 (INDUSTRIAL, EXTENDED)
FIGURE 12-5:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
Q1
OSC1
1
3
4
3
4
2
CLKOUT
TABLE 12-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Sym
Characteristic
Min Typ†
Max
Units
Conditions
(1)
FOSC External CLKIN Frequency
DC
DC
DC
DC
5
—
—
—
—
—
4
37
4
kHz LP Osc mode
MHz XT mode
20
20
37
—
4
MHz HS mode
MHz EC mode
(1)
kHz LP Osc mode
MHz INTOSC mode
MHz RC Osc mode
MHz XT Osc mode
MHz HS Osc mode
Oscillator Frequency
—
DC
0.±
±
—
—
—
4
20
(1)
±
TOSC
External CLKIN Period
27
50
—
—
—
—
∞
∞
µs LP Osc mode
ns HS Osc mode
ns EC Osc mode
ns XT Osc mode
µs LP Osc mode
ns INTOSC mode
ns RC Osc mode
ns XT Osc mode
ns HS Osc mode
50
∞
250
27
∞
(1)
200
—
Oscillator Period
—
250
—
250
250
50
—
—
±0,000
±,000
—
(1)
2
3
TCY
Instruction Cycle Time
200
TCY
—
DC
—
ns TCY = 4/FOSC
TosL, External CLKIN (OSC±) High 2*
TosH External CLKIN Low
µs LP oscillator, TOSC L/H duty cycle
20*
—
—
ns HS oscillator, TOSC L/H duty
cycle
±00 *
—
—
—
—
—
—
ns XT oscillator, TOSC L/H duty cycle
ns LP oscillator
4
TosR, External CLKIN Rise
External CLKIN Fall
50*
25*
±5*
TosF
—
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 OSC± pin. When an external clock input is used, the ‘max’ cycle time limit is ‘DC’ (no clock)
for all devices.
DS41190C-page 94
2003 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
