PIC16F688 Microchip Technology Inc., PIC16F688 Datasheet - Page 160

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PIC16F688

Manufacturer Part Number
PIC16F688
Description
Manufacturer
Microchip Technology Inc.
Datasheet
PIC16F688
FIGURE 14-8:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1CKI
TMR0 or
TMR1
TABLE 14-5:
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
-40°C ≤ T
≤ +125°C
Operating Temperature
A
Param
Sym
Characteristic
No.
40*
T
0H
T0CKI High Pulse Width
T
41*
T
0L
T0CKI Low Pulse Width
T
42*
T
0P
T0CKI Period
T
45*
T
1H
T1CKI High
Synchronous, No Prescaler
T
Time
Synchronous,
with Prescaler
Asynchronous
46*
T
1L
T1CKI Low
Synchronous, No Prescaler
T
Time
Synchronous,
with Prescaler
Asynchronous
47*
T
1P
T1CKI Input
Synchronous
T
Period
Asynchronous
48
F
1
Timer1 Oscillator Input Frequency Range
T
(oscillator enabled by setting bit T1OSCEN)
49*
TCKEZ
1 Delay from External Clock Edge to Timer
TMR
Increment
*
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.
DS41203D-page 158
40
41
42
45
46
47
Min
Typ†
No Prescaler
0.5 T
+ 20
CY
With Prescaler
10
No Prescaler
0.5 T
+ 20
CY
With Prescaler
10
Greater of:
20 or T
+ 40
CY
N
0.5 T
+ 20
CY
15
30
0.5 T
+ 20
CY
15
30
Greater of:
30 or T
+ 40
CY
N
60
32.768
2 T
OSC
49
Max
Units
Conditions
ns
ns
ns
ns
ns
N = prescale value
(2, 4, ..., 256)
ns
ns
ns
ns
ns
ns
ns
N = prescale value
(1, 2, 4, 8)
ns
kHz
7 T
Timers in Sync
OSC
mode
© 2007 Microchip Technology Inc.

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