PIC16C55X(A)
FIGURE 10-5: TIMER0 CLOCK TIMING
RA4/T0CKI
41
40
42
TMR0
TABLE 10-5: TIMER0 CLOCK REQUIREMENTS
Parameter Sym Characteristic
No.
Min
Typ† Max Units Conditions
40
41
42
Tt0H T0CKI High Pulse Width
Tt0L T0CKI Low Pulse Width
Tt0P T0CKI Period
No Prescaler
0.5 TCY + 20*
10*
—
—
—
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
With Prescaler
No Prescaler
With Prescaler
0.5 TCY + 20*
10*
TCY + 40*
N
N = prescale value
(1, 2, 4, ..., 256)
*
†
These parameters are characterized but not tested.
Data in "Typ" column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
FIGURE 10-6: LOAD CONDITIONS
Load condition 1
Load condition 2
VDD/2
RL
CL
CL
Pin
Pin
VSS
VSS
RL = 464Ω
CL = 50 pF for all pins except OSC2
15 pF for OSC2 output
1997 Microchip Technology Inc.
Preliminary
DS40143B-page 77
MICROCHIP [ MICROCHIP ]
