Specifications

PIC16F627A/628A/648A
DS40044B-page 144 Preliminary  2004 Microchip Technology Inc.
TABLE 17-8: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
FIGURE 17-9: CAPTURE/COMPARE/PWM TIMINGS
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
40 Tt0H T0CKI High Pulse Width No Prescaler 0.5TCY + 20* — — ns
With Prescaler 10* — — ns
41 Tt0L T0CKI Low Pulse Width No Prescaler 0.5T
CY + 20* — — ns
With Prescaler 10* — — ns
42 Tt0P T0CKI Period Greater of:
T
CY + 40*
N
— — ns N = prescale
value (2, 4, ...,
256)
45 Tt1H T1CKI High
Time
Synchronous, No Prescaler 0.5T
CY + 20* — — ns
Synchronous,
with Prescaler
PIC16F62X 15* — — ns
PIC16LF62X 25* — — ns
Asynchronous PIC16F62X 30* — — ns
PIC16LF62X 50* — — ns
46 Tt1L T1CKI Low
Time
Synchronous, No Prescaler 0.5T
CY + 20* — — ns
Synchronous,
with Prescaler
PIC16F62X 15* — — ns
PIC16LF62X 25* — — ns
Asynchronous PIC16F62X 30* — — ns
PIC16LF62X 50* — — ns
47 Tt1P T1CKI input
period
Synchronous PIC16F62X Greater of:
T
CY + 40*
N
— — ns N = prescale
value (1, 2, 4, 8)
PIC16LF62X Greater of:
T
CY + 40*
N
———
Asynchronous PIC16F62X 60* — — ns
PIC16LF62X 100* — — ns
Ft1 Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
— 32.7
(1)
—kHz
48 TCKEZt
mr1
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.
Note 1: This oscillator is intended to work only with 32.768 kHz watch crystals and their manufactured tolerances.
Higher value crystal frequencies may not be compatible with this crystal driver.
(CAPTURE MODE)
50 51
52
53 54
RB3/CCP1
(COMPARE OR PWM MODE)
RB3/CCP1