PIC16C54/55/56/57
PIC16C5X
11.7
Timing Diagrams and Specifications
FIGURE 11-2: EXTERNAL CLOCK TIMING - PIC16C54/55/56/57
Q4
Q3
Q4
4
Q1
Q1
Q2
OSC1
1
3
3
4
2
CLKOUT
TABLE 11-3: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C54/55/56/57
AC Characteristics Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0°C ≤ TA ≤ +70°C (commercial)
–40°C ≤ TA ≤ +85°C (industrial)
–40°C ≤ TA ≤ +125°C (extended)
Operating Voltage VDD range is described in Section 11.1, Section 11.2 and Section 11.3
Parameter
No.
(1)
Sym
Characteristic
Min Typ
Max Units
Conditions
(2)
FOSC
External CLKIN Frequency
DC
DC
DC
DC
DC
DC
0.1
4
—
—
—
—
—
—
—
—
—
—
—
4
MHz XT osc mode
MHz 10 MHz mode
10
20
16
40
4
MHz HS osc mode (Com/Indust)
MHz HS osc mode (Extended)
kHz LP osc mode
(2)
Oscillator Frequency
MHz RC osc mode
4
MHz XT osc mode
10
20
16
40
MHz 10 MHz mode
4
MHz HS osc mode (Com/Indust)
MHz HS osc mode (Extended)
kHz LP osc mode
4
DC
*
These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5.0V, 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.
3: Instruction cycle period (TCY) equals four times the input oscillator time base period.
1998 Microchip Technology Inc.
Preliminary
DS30453B-page 75
MICROCHIP [ MICROCHIP ]
