PIC12C5XX
13.6
Timing Diagrams and Specifications
FIGURE 13-2: EXTERNAL CLOCK TIMING - PIC12C508A, PIC12C509A, PIC12CR509A,
PIC12CE518, PIC12CE519, PIC12LC508A, PIC12LC509A, PIC12LCR509A,
PIC12LCE518 and PIC12LCE519
Q4
Q3
Q4
Q1
Q1
Q2
OSC1
1
3
3
4
4
2
TABLE 13-2: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC12C508A, PIC12C509A,
PIC12CE518, PIC12CE519, PIC12LC508A, PIC12LC509A, PIC12LCR509A,
PIC12LCE518 and PIC12LCE519
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 13.1
Parameter
Sym
(1)
Characteristic
Min
Max Units
Conditions
Typ
No.
External CLKIN Frequency(2)
FOSC
DC
DC
DC
0.1
DC
—
—
—
—
—
4
200
4
MHz XT osc mode
kHz LP osc mode
Oscillator Frequency(2)
External CLKIN Period(2)
Oscillator Period(2)
MHz EXTRC osc mode
MHz XT osc mode
kHz LP osc mode
4
200
1
TOSC
250
5
—
—
—
—
ns XT osc mode
ms LP osc mode
ns EXTRC osc mode
ns XT osc mode
ms LP osc mode
—
250
250
5
—
—
—
10,000
—
—
Instruction Cycle Time(3)
2
3
Tcy
—
4/FOSC
—
TosL, TosH Clock in (OSC1) Low or High Time
TosR, TosF Clock in (OSC1) Rise or Fall Time
These parameters are characterized but not tested.
50*
2*
—
—
—
—
—
—
ns XT oscillator
ms LP oscillator
ns XT oscillator
ns LP oscillator
4
—
25*
50*
—
*
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 oper-
ating 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.
DS40139E-page 86
1999 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
