PIC16F737-I Datasheet, PDF (228/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC16F7X7
FIGURE 18-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
RA4/T0CKI/C1OUT
RC0/T1OSO/T1CKI
40
41
42
TMR0 or TMR1
45
46
47
48
Note: Refer to Figure 18-4 for load conditions.
TABLE 18-7: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Typ† Max Units Conditions
40* TT0H
T0CKI High Pulse Width
No prescaler 0.5 TCY + 20 — — ns Must also meet
With prescaler
10
— — ns ^{parameter 42}
41* TT0L
T0CKI Low Pulse Width
No prescaler 0.5 TCY + 20 — — ns Must also meet
With prescaler
10
— — ns ^{parameter 42}
42* TT0P
T0CKI Period
No prescaler
TCY + 40
— — ns
With prescaler Greater of: — — ns N = prescale
20 or TCY + 40
value (2, 4, ...,
N
256)
45* TT1H
T1CKI High Time Synchronous, Prescaler = 1
Synchronous, PIC16F7X7
Prescaler = 2, 4, 8 _PIC16LF7X7
0.5 TCY + 20 — —
15
——
25
——
ns Must also meet
ns ^{parameter 47}
ns
Asynchronous PIC16F7X7
30
— — ns
PIC16LF7X7
50
— — ns
46* TT1L
T1CKI Low Time
Synchronous, Prescaler = 1
Synchronous, PIC16F7X7
Prescaler = 2, 4, 8 _PIC16LF7X7
0.5 TCY + 20 — —
15
——
25
——
ns Must also meet
ns ^{parameter 47}
ns
Asynchronous PIC16F7X7
30
— — ns
PIC16LF7X7
50
— — ns
47* TT1P
T1CKI Input
Period
Synchronous
PIC16F7X7
Greater of: — — ns N = prescale
30 or TCY + 40
value (1, 2, 4, 8)
N
PIC16LF7X7
Greater of: — — ns N = prescale
50 or TCY + 40
value (1, 2, 4, 8)
N
Asynchronous PIC16F7X7
60
— — ns
PIC16LF7X7
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
2 TOSC
— 7 TOSC —
* 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.
DS30498C-page 226
 2004 Microchip Technology Inc.