PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 235

• Manufacturer Part Number: PIC17C752
• Description: High-Performance 8-Bit CMOS EPROM Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 20-5: TIMER0 EXTERNAL CLOCK TIMINGS
TABLE 20-5:
FIGURE 20-6: TIMER1, TIMER2, AND TIMER3 EXTERNAL CLOCK TIMINGS
TABLE 20-6:
1997 Microchip Technology Inc.
Param.
*
†
§
*
†
§
Param.
No.
45
46
47
48
No.
TCLK12
or
TCLK3
TMRx
RA1/T0CKI
40
41
42
These parameters are characterized but not tested.
Data in "Typ" column is at 5V, 25˚C unless otherwise stated. These parameters are for design guidance only and are not
tested.
This specification ensured by design.
These parameters are characterized but not tested.
Data in “Typ” column is at 5V, 25 C unless otherwise stated. These parameters are for design guidance only and are not
tested.
This specification ensured by design.
TckE2tmrI Delay from selected External Clock Edge to
Tt123H
Tt123P
Tt123L
Tt0H T0CKI High Pulse Width
Sym Characteristic
Tt0L T0CKI Low Pulse Width
Tt0P T0CKI Period
Sym
TIMER0 EXTERNAL CLOCK REQUIREMENTS
TIMER1, TIMER2, AND TIMER3 EXTERNAL CLOCK REQUIREMENTS
Characteristic
TCLK12 and TCLK3 high time
TCLK12 and TCLK3 low time
TCLK12 and TCLK3 input period
Timer increment
No Prescaler
With Prescaler
No Prescaler
With Prescaler
45
40
Preliminary
42
47
Greater of:
20 ns or Tcy + 40 §
41
46
0.5T
0.5T
0.5T
0.5T
T
2T
CY
CY
CY
Min
10*
10*
CY
CY
Min
OSC
+ 40 §
N
+ 20 §
+ 20 §
+ 20 §
+ 20 §
N
§
48
Typ
—
—
—
—
†
Typ† Max Units Conditions
—
—
—
—
—
6Tosc §
Max
—
—
—
48
—
—
—
—
—
Units Conditions
ns
ns
ns
—
ns
ns
ns
ns
ns
DS30264A-page 235
N = prescale value
(1, 2, 4, 8)
N = prescale value
(1, 2, 4, ..., 256)