Datasheet

PIC16F62X
DS40300C-page 136 Preliminary  2003 Microchip Technology Inc.
TABLE 17-4: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
Fosc External CLKIN Frequency
(1)
DC — 4 MHz XT and ER Osc mode,
V
DD = 5.0V
DC — 20 MHz HS Osc mode
DC — 200 kHz LP Osc mode
Oscillator Frequency
(1)
— 4 MHz ER Osc mode, VDD = 5.0V
0.1 — 4 MHz XT Osc mode
1—
—
20
200
MHz
kHz
HS Osc mode
LP Osc mode
3.65 4 4.28 MHz INTRC mode (fast), V
DD = 5.0V
37 kHz INTRC mode (slow)
4 INTRC Internal Calibrated RC 3.65 4.00 4.28 MHz V
DD = 5.0V
5 ER External Biased ER Frequency 10 kHz 8 MHz V
DD = 5.0V
1 Tosc External CLKIN Period
(1)
250 — — ns XT and ER Osc mode
50 — — ns HS Osc mode
5——µsLP Osc mode
Oscillator Period
(1)
250 — — ns ER Osc mode
250 — 10,000 ns XT Osc mode
50 — 1,000 ns HS Osc mode
5 µsLP Osc mode
250 ns INTRC mode (fast)
27 µs INTRC mode (slow)
2 Tcy Instruction Cycle Time 1.0 T
CY DC ns TCY = 4/FOSC
3 TosL,
TosH
External CLKIN (OSC1) High
External CLKIN Low
100 * — — ns XT oscillator, T
OSC L/H duty
cycle*
* These parameters are characterized but not 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 (Tcy) equals four times the input oscillator time-based 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.