PIC16LC63A-04 Datasheet, PDF (127/184 Pages) Microchip Technology – 8-Bit CMOS Microcontrollers with A/D Converter

PIC16C63A/65B/73B/74B
FIGURE 16-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T1CKI
40
41
42
45
46
TMR0 or
TMR1
47
48
Note: Refer to Figure 16-4 for load conditions.
TABLE 16-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ† Max Units Conditions
40*
Tt0H T0CKI High Pulse Width
41*
Tt0L T0CKI Low Pulse Width
42*
Tt0P T0CKI Period
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
0.5TCY + 20
10
0.5TCY + 20
10
TCY + 40
——
——
——
——
——
ns Must also meet
ns ^{parameter 42}
ns Must also meet
ns ^{parameter 42}
ns
With Prescaler Greater of:
20 or TCY + 40
N
——
ns N = prescale value
(2, 4,..., 256)
45*
Tt1H T1CKI High Time Synchronous, Prescaler = 1
0.5TCY + 20 — — ns Must also meet
Synchronous, PIC16CXX
15
— — ns ^{parameter 47}
Prescaler = 2,4,8 _PIC16LCXX
25
— — ns
Asynchronous PIC16CXX
30
— — ns
PIC16LCXX
50
— — ns
46*
Tt1L T1CKI Low Time Synchronous, Prescaler = 1
0.5TCY + 20 — — ns Must also meet
Synchronous, PIC16CXX
15
— — ns ^{parameter 47}
Prescaler = 2,4,8 _PIC16LCXX
25
— — ns
Asynchronous PIC16CXX
30
— — ns
47*
Tt1P T1CKI input
period
Synchronous
PIC16LCXX
50
— — ns
PIC16CXX
Greater of:
— — ns N = prescale value
30 or TCY + 40
(1, 2, 4, 8)
N
PIC16LCXX
Greater of:
50 or TCY + 40
N
N = prescale value
(1, 2, 4, 8)
Asynchronous PIC16CXX
60
— — ns
PIC16LCXX
100
— — ns
Ft1 Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
DC
— 200 kHz
48 TCKEZtmr1 Delay from external clock edge to timer increment
2TOSC
— 7TOSC —
* 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.
 2000 Microchip Technology Inc.
DS30605C-page 127