Datasheet

PIC16F8X
DS30430B-page 78  1996 Microchip Technology Inc.
Applicable Devices F83 CR83 F84 CR84
11.5 Timing Diagrams and Specifications
FIGURE 11-3: EXTERNAL CLOCK TIMING
TABLE 11-3: EXTERNAL CLOCK TIMING REQUIREMENTS
Parameter
No. Sym Characteristic Min Typ† Max Units Conditions
FOSC External CLKIN Frequency
(1)
DC — 2 MHz XT, RC osc PIC16LF8X-04
DC — 4 MHz XT, RC osc PIC16F8X-04
DC — 10 MHz HS osc PIC16F8X-10
DC — 200 kHz LP osc PIC16LF8X-04
Oscillator Frequency
(1)
DC — 2 MHz RC osc PIC16LF8X-04
DC — 4 MHz RC osc PIC16F8X-04
0.1 — 2 MHz XT osc PIC16LF8X-04
0.1 — 4 MHz XT osc PIC16F8X-04
1.0 — 10 MHz HS osc PIC16F8X-10
DC — 200 kHz LP osc PIC16LF8X-04
1 Tosc External CLKIN Period
(1)
500 — — ns XT, RC osc PIC16LF8X-04
250 — — ns XT, RC osc PIC16F8X-04
100 — — ns HS osc PIC16F8X-10
5.0 — — µs LP osc PIC16LF8X-04
Oscillator Period
(1)
500 — — ns RC osc PIC16LF8X-04
250 — — ns RC osc PIC16F8X-04
500 — 10,000 ns XT osc PIC16LF8X-04
250 — 10,000 ns XT osc PIC16F8X-04
100 — 1,000 ns HS osc PIC16F8X-10
5.0 — — µs LP osc PIC16LF8X-04
2T
CY Instruction Cycle Time
(1)
0.4 4/Fosc DC µs
3 TosL,
TosH
Clock in (OSC1) High or Low
Time
60 * — — ns XT osc PIC16LF8X-04
50 * — — ns XT osc PIC16F8X-04
2.0 * — — µs LP osc PIC16LF8X-04
35 * — — ns HS osc PIC16F8X-10
4 TosR,
TosF
Clock in (OSC1) Rise or Fall Time 25 * — — ns XT osc PIC16F8X-04
50 * — — ns LP osc PIC16LF8X-04
15 * — — ns HS osc PIC16F8X-10
* These parameters are characterized but no tested.
† Data in "Typ" column is at 5.0V, 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 consumption. All devices are tested to operate at "min." values with an
external clock applied to the OSC1 pin.
When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices.
OSC1
CLKOUT
Q4
Q1 Q2
Q3 Q4 Q1
13344
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