PIC16CR54C
10.4
Timing Diagrams and Specifications
FIGURE 10-2: EXTERNAL CLOCK TIMING - PIC16CR54C
Q4
Q3
Q4
4
Q1
Q1
Q2
OSC1
1
3
3
4
2
CLKOUT
TABLE 10-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16CR54C
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0°C ≤ TA ≤ +70°C (commercial)
–40°C ≤ TA ≤ +85°C (industrial)
Operating Voltage VDD range is described in Section 10.1
Parameter
(1)
No.
Sym
Characteristic
Min Typ
Max Units
Conditions
(2)
FOSC
External CLKIN Frequency
DC
DC
DC
DC
DC
0.455
4
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4.0
4.0
20
MHz XT osc mode
MHz HS osc mode (04)
MHz HS osc mode (20)
kHz LP osc mode
200
4.0
4.0
4.0
20
(2)
Oscillator Frequency
MHz RC osc mode
MHz XT osc mode
MHz HS osc mode (04)
MHz HS osc mode (20)
kHz LP osc mode
4
5
200
—
(2)
1
TOSC
External CLKIN Period
250
250
50
ns
ns
ns
µs
ns
ns
ns
ns
µs
XT osc mode
—
HS osc mode (04)
HS osc mode (20)
LP osc mode
—
5.0
250
250
250
50
—
(2)
Oscillator Period
—
RC osc mode
2,200
250
250
200
XT osc mode
HS osc mode (04)
HS osc mode (20)
LP osc mode
5.0
*
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 condi-
tions 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
DS40191A-page 57
MICROCHIP [ MICROCHIP ]
