PIC17C42 Microchip Technology, PIC17C42 Datasheet - Page 187

• Manufacturer Part Number: PIC17C42
• Description: High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
• Manufacturer: Microchip Technology

FIGURE 19-5: TIMER0 CLOCK TIMINGS
TABLE 19-5:
FIGURE 19-6: TIMER1, TIMER2, AND TIMER3 CLOCK TIMINGS
TABLE 19-6:
Parameter
Parameter
1996 Microchip Technology Inc.
*
†
§
*
†
§
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 TCLK12 and TCLK3 high time
Tt123P TCLK12 and TCLK3 input period
Tt123L
Tt0H T0CKI High Pulse Width
Sym
Sym Characteristic
Tt0L T0CKI Low Pulse Width
Tt0P T0CKI Period
TIMER0 CLOCK REQUIREMENTS
TIMER1, TIMER2, AND TIMER3 CLOCK REQUIREMENTS
Characteristic
TCLK12 and TCLK3 low time
Timer increment
No Prescaler
With Prescaler
No Prescaler
With Prescaler
45
40
42
47
Greater of:
20 ns or Tcy + 40 §
Applicable Devices 42 R42 42A 43 R43 44
41
0.5T
0.5T
46
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
—
—
—
—
—
PIC17C4X
Units Conditions
ns
ns
ns
ns
ns
ns
ns
ns
DS30412C-page 187
N = prescale value
(1, 2, 4, 8)
N = prescale value
(1, 2, 4, ..., 256)