PIC16F84A_07 Datasheet, PDF (59/88 Pages) Microchip Technology – 18-pin Enhanced FLASH/EEPROM 8-bit Microcontroller

PIC16F84A
9.3.3 TIMING DIAGRAMS AND SPECIFICATIONS
FIGURE 9-6:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
OSC1
CLKOUT
1
3
3
2
Q4
4
Q1
4
TABLE 9-2: EXTERNAL CLOCK TIMING REQUIREMENTS
Param No. Sym
Characteristic
Min Typ† Max Units
Conditions
FOSC External CLKIN Frequency⁽¹⁾ DC
—
DC
—
2 MHz XT, RC osc (-04, LF)
4 MHz XT, RC osc (-04)
DC
—
20 MHz HS osc
(-20)
Oscillator Frequency⁽¹⁾
DC
—
200 kHz LP osc
DC
—
2 MHz RC osc
(-04, LF)
(-04, LF)
DC
—
4 MHz RC osc
(-04)
0.1
—
2 MHz XT osc
(-04, LF)
0.1
—
4 MHz XT osc
(-04)
1.0
—
20 MHz HS osc
(-20)
1
TOSC External CLKIN Period⁽¹⁾
DC
—
500 —
200 kHz LP osc
(-04, LF)
—
ns XT, RC osc (-04, LF)
250 —
—
ns XT, RC osc (-04)
50
—
—
ns HS osc
(-20)
Oscillator Period⁽¹⁾
5.0
—
500 —
—
µs LP osc
—
ns RC osc
(-04, LF)
(-04, LF)
250 —
—
ns RC osc
(-04)
500 — 10,000 ns XT osc
(-04, LF)
250 — 10,000 ns XT osc
(-04)
50
— 1,000 ns HS osc
(-20)
2
TCY Instruction Cycle Time⁽¹⁾
5.0
—
—
0.2 4/FOSC DC
µs LP osc
µs
(-04, LF)
3
TosL, Clock in (OSC1) High or Low 60
—
TosH Time
50
—
—
ns XT osc
—
ns XT osc
(-04, LF)
(-04)
2.0
—
—
µs LP osc
(-04, LF)
17.5 —
—
ns HS osc
(-20)
4
TosR, Clock in (OSC1) Rise or Fall 25
—
TosF Time
50
—
—
ns XT osc
—
ns LP osc
(-04)
(-04, LF)
7.5
—
—
ns HS osc
(-20)
† 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 (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 opera-
tion 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.
© 2001 Microchip Technology Inc.
DS35007B-page 57