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PIC16(L)F1508/9
DS40001609E-page 322
2011-2015 Microchip Technology Inc.
FIGURE 29-5:
CLOCK TIMING
TABLE 29-7:
CLOCK OSCILLATOR TIMING REQUIREMENTS
(unless otherwise stated)
Param.
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
OS01
F
OSC
External CLKIN Frequency
(1)
DC
—
0.5
MHz
External Clock (ECL)
DC
—
4
MHz
External Clock (ECM)
DC
—
20
MHz
External Clock (ECH)
Oscillator Frequency
(1)
—
32.768
—
kHz
LP Oscillator
0.1
—
4
MHz
XT Oscillator
1
—
4
MHz
HS Oscillator
1
—
20
MHz
HS Oscillator, V
DD
> 2.7V
DC
—
4
MHz
EXTRC, V
DD
> 2.0V
OS02
T
OSC
External CLKIN Period
(1)
27
—
µs
LP Oscillator
250
—
ns
XT Oscillator
50
—
ns
HS Oscillator
50
—
ns
External Clock (EC)
Oscillator Period
(1)
—
30.5
—
µs
LP Oscillator
250
—
10,000
ns
XT Oscillator
50
—
1,000
ns
HS Oscillator
250
—
—
ns
EXTRC
OS03
T
CY
Instruction Cycle Time
(1)
200
T
CY
DC
ns
T
CY
= 4/F
OSC
OS04*
TosH,
TosL
External CLKIN High
External CLKIN Low
2
—
—
µs
LP Oscillator
100
—
—
ns
XT Oscillator
20
—
—
ns
HS Oscillator
OS05*
TosR,
TosF
External CLKIN Rise
External CLKIN Fall
0
—
—
ns
LP Oscillator
0
—
—
ns
XT Oscillator
0
—
—
ns
HS Oscillator
*
These parameters are characterized but not tested.
†
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1:
Instruction cycle period (T
CY
) 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 con-
sumption. All devices are tested to operate at “min” values with an external clock applied to CLKIN pin. When an external
clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
CLKIN
CLKOUT
Q4
Q1
Q2
Q3
Q4
Q1
OS02
OS03
(CLKOUT mode)
Note:
See
OS11
OS12
Содержание PIC12F1501
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