PIC17C7XX_13 Datasheet, PDF (249/306 Pages) Microchip Technology – High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D

20.4 Timing Diagrams and Specifications
FIGURE 20-6:
EXTERNAL CLOCK TIMING
Q4
Q1
Q2
Q3
OSC1
1
3
2
OSC2 †
† In EC and RC modes only.
PIC17C7XX
Q4
Q1
3
4
4
TABLE 20-1: EXTERNAL CLOCK TIMING REQUIREMENTS
Param
No.
Sym
Characteristic
Min Typ† Max Units
Conditions
FOSC External CLKIN
Frequency (Note 1)
DC
—
DC
—
DC
—
8 MHz EC osc mode - 08 devices (8 MHz devices)
16 MHz
- 16 devices (16 MHz devices)
33 MHz
- 33 devices (33 MHz devices)
Oscillator Frequency
(Note 1)
DC
—
2
—
2
—
2
—
DC
—
4 MHz RC osc mode
8 MHz XT osc mode - 08 devices (8 MHz devices)
16 MHz
- 16 devices (16 MHz devices)
33 MHz
- 33 devices (33 MHz devices)
2 MHz LF osc mode
1
TOSC External CLKIN Period
125
—
(Note 1)
62.5 —
30.3 —
—
ns EC osc mode - 08 devices (8 MHz devices)
—
ns
- 16 devices (16 MHz devices)
—
ns
- 33 devices (33 MHz devices)
Oscillator Period
(Note 1)
250
—
—
ns RC osc mode
125
— 1,000 ns XT osc mode - 08 devices (8 MHz devices)
62.5 — 1,000 ns
- 16 devices (16 MHz devices)
30.3 — 1,000 ns
- 33 devices (33 MHz devices)
500
—
—
ns LF osc mode
2
TCY Instruction Cycle Time
121.2 4/FOSC DC
ns
(Note 1)
3
TosL, Clock in (OSC1)
TosH High or Low Time
10
—
—
ns EC oscillator
4
TosR, Clock in (OSC1)
TosF Rise or Fall Time
—
—
5
ns EC oscillator
†
Data in “Typ” column is at 5V, 25°C unless otherwise stated.
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
consumption. 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.
 1998-2013 Microchip Technology Inc.
DS30289C-page 249