Provision ISR PTG-01 Spécifications télécharger pdf (Page 131)

 2002 Microchip Technology Inc. DS30325B-page 129

PIC16F7X

FIGURE 15-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS

TABLE 15-4: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS

Note: Refer to Figure 15-3 for load conditions.

RA4/T0CKI

RC0/T1OSO/T1CKI

TMR0 or TMR1

Param

No.

Symbol Characteristic Min Typ† Max Units Conditions

40* Tt0H T0CKI High Pulse Width No Prescaler 0.5T

CY + 20 ——ns Must also meet

parameter 42

With Prescaler 10 ——ns

41* Tt0L T0CKI Low Pulse Width No Prescaler 0.5T

CY + 20 ——ns Must also meet

parameter 42

With Prescaler 10 ——ns

42* Tt0P T0CKI Period No Prescaler T

CY + 40 ——ns

With Prescaler Greater of:

20 or T

CY + 40

——ns N = prescale value

(2, 4, ..., 256)

45* Tt1H T1CKI High Time Synchronous, Prescaler = 1 0.5T

CY + 20 ——ns Must also meet

parameter 47

Synchronous,

Prescaler = 2,4,8

Standard(F)15——ns

Extended(LF)25 ——ns

Asynchronous Standard(F)30——ns

Extended(LF)50 ——ns

46* Tt1L T1CKI Low Time Synchronous, Prescaler = 1 0.5T

CY + 20 ——ns Must also meet

parameter 47

Synchronous,

Prescaler = 2,4,8

Standard(F)15——ns

Extended(LF)25 ——ns

Asynchronous Standard(F)30——ns

Extended(LF)50 ——ns

47* Tt1P T1CKI Input

Period

Synchronous Standard(F) Greater of:

30 or T

CY + 40

——ns N = prescale value

(1, 2, 4, 8)

Extended(LF) Greater of:

50 or T

CY + 40

N = prescale value

(1, 2, 4, 8)

Asynchronous Standard(F)60——ns

Extended(LF) 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 T

OSC — 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.

1 2 ... 126 127 128 129 130 131 132 133 134 135 136 ... 173 174

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Provision ISR PTG-01 Spécifications Page 131

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