PIC16C52
PIC16C5X
10.4
Timing Diagrams and Specifications
FIGURE 10-2: EXTERNAL CLOCK TIMING - PIC16C52
Q4
Q3
Q4
4
Q1
Q1
Q2
OSC1
1
3
3
4
2
CLKOUT
TABLE 10-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C52
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
0.1
250
250
250
250
—
—
—
4
4
MHz XT osc mode
MHz RC osc mode
MHz XT osc mode
(2)
Oscillator Frequency
—
4
(2)
1
TOSC
External CLKIN Period
—
—
ns
ns
ns
ns
—
ns
ns
RC osc mode
XT osc mode
RC osc mode
XT osc mode
—
—
(2)
Oscillator Period
—
—
—
10,000
—
(3)
2
3
4
TCY
Instruction Cycle Time
4/FOSC
—
TosL, TosH Clock in (OSC1) Low or High Time
TosR, TosF Clock in (OSC1) Rise or Fall Time
85*
—
—
XT oscillator
XT oscillator
—
25*
*
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
DS30453B-page 63
MICROCHIP [ MICROCHIP ]
