Datasheet

PIC16F527
DS41652A-page 94 Preliminary  2012 Microchip Technology Inc.
TABLE 15-8: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C  T
A  +85C (industrial),
-40C  T
A  +125C (extended)
Operating Voltage V
DD range is described in Section 15.1 “DC
Characteristics: PIC16F527 (Industrial)”
Param
No.
Sym. Characteristic Min. Typ.
(1)
Max. Units Conditions
1A F
OSC External CLKIN Frequency
(2)
DC — 4 MHz XT Oscillator mode
DC — 20 MHz HS/EC Oscillator mode
DC — 200 kHz LP Oscillator mode
Oscillator Frequency
(2)
— — 4 MHz EXTRC Oscillator mode
0.1 — 4 MHz XT Oscillator mode
4 — 20 MHz HS/EC Oscillator mode
— — 200 kHz LP Oscillator mode
1T
OSC External CLKIN Period
(2)
250 — — ns XT Oscillator mode
50 — — ns HS/EC Oscillator mode
5— —s LP Oscillator mode
Oscillator Period
(2)
250 — — ns EXTRC Oscillator mode
250 — 10,000 ns XT Oscillator mode
50 — 250 ns HS/EC Oscillator mode
5— —s LP Oscillator mode
2T
CY Instruction Cycle Time 200 4/FOSC —ns
3 TosL,
TosH
Clock in (OSC1) Low or High
Time
50* — — ns XT Oscillator
2* — — s LP Oscillator
10* — — ns HS/EC Oscillator
4TosR,
TosF
Clock in (OSC1) Rise or Fall
Time
— — 25* ns XT Oscillator
— — 50* ns LP Oscillator
— — 15* ns HS/EC Oscillator
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5V, 25C unless otherwise stated. These parameters are for
design guidance only and are not tested.
2: 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. When an external clock
input is used, the “max” cycle time limit is “DC” (no clock) for all devices.