PIC12CE67X
12.6
Timing Diagrams and Specifications
FIGURE 12-2: EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
Q4
4
Q1
OSC1
1
3
3
4
2
CLKOUT
TABLE 12-2: CLOCK TIMING REQUIREMENTS
Parameter Sym Characteristic
No.
Min
Typ†
Max
Units Conditions
Fosc External CLKIN Frequency
DC
DC
DC
DC
DC
.455
4
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4
4
MHz XT and EXTRC osc mode
MHz HS osc mode (PIC12CE67X-04)
MHz HS osc mode (PIC12CE67X-10)
kHz LP osc mode
(Note 1)
10
200
4
Oscillator Frequency
(Note 1)
MHz EXTRC osc mode
4
MHz XT osc mode
4
MHz HS osc mode (PIC12CE67X-04)
MHz HS osc mode (PIC12CE67X-10)
kHz LP osc mode
4
10
200
—
5
1
Tosc External CLKIN Period
250
250
100
5
ns
ns
ns
µs
ns
ns
ns
ns
µs
ns
ns
µs
ns
ns
ns
ns
XT and EXTRC osc mode
HS osc mode (PIC12CE67X-04)
HS osc mode (PIC12CE67X-10)
LP osc mode
(Note 1)
—
—
—
Oscillator Period
(Note 1)
250
250
250
100
5
—
EXTRC osc mode
XT osc mode
10,000
250
250
—
HS osc mode (PIC12CE67X-04)
HS osc mode (PIC12CE67X-10)
LP osc mode
2
3
TCY
Instruction Cycle Time (Note 1) 400
DC
—
TCY = 4/FOSC
TosL, External Clock in (OSC1) High
TosH or Low Time
50
2.5
10
—
XT oscillator
—
LP oscillator
—
HS oscillator
4
TosR, External Clock in (OSC1) Rise
TosF or Fall Time
25
50
15
XT oscillator
—
LP oscillator
—
HS oscillator
†
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 con-
sumption. 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. OSC2 is disconnected
(has no loading) for the PIC12CE67X.
DS40181B-page 90
Preliminary
1998 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
