1996 Microchip Technology Inc.
Advance Information
DS40139A-page 57
PIC12C5XX
10.4
Timing Diagrams and Specifications
FIGURE 10-2: EXTERNAL CLOCK TIMING - PIC12C5XX
TABLE 10-1:
EXTERNAL CLOCK TIMING REQUIREMENTS - PIC12C5XX
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0
°
C
≤
T
A
≤
+70
°
C (commercial),
–40
°
C
≤
T
A
≤
+85
°
C (industrial),
Operating Voltage V
DD
range is described in Section 10.1
Parameter
No.
Sym
Characteristic
Min
Typ
(1)
Max
Units
Conditions
F
OSC
External CLKIN Frequency
(2)
DC
—
4
MHz
EXTRC osc mode
DC
—
4
MHz
XT osc mode
DC
—
200
kHz
LP osc mode
Oscillator Frequency
(2)
DC
—
4
MHz
EXTRC osc mode
0.1
—
4
MHz
XT osc mode
DC
—
200
kHz
LP osc mode
1
T
OSC
External CLKIN Period
(2)
250
—
—
ns
EXTRC osc mode
250
—
—
ns
XT osc mode
5
—
—
ms
LP osc mode
Oscillator Period
(2)
250
—
—
ns
EXTRC osc mode
250
—
10,000
ns
XT osc mode
5
—
—
ms
LP osc mode
2
Tcy
Instruction Cycle Time
(3)
—
4/F
OSC
—
—
3
TosL, TosH
Clock in (OSC1) Low or High Time
50*
—
—
ns
XT oscillator
2*
—
—
ms
LP oscillator
4
TosR, TosF Clock in (OSC1) Rise or Fall Time
—
—
25*
ns
XT oscillator
—
—
50*
ns
LP oscillator
* 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 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 (T
CY
) equals four times the input oscillator time base period.
OSC1
Q4
Q1
Q2
Q3
Q4
Q1
1
3
3
4
4
2