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PIC18F4685-I/SP Datasheet(PDF) 441 Page - Microchip Technology

Part # PIC18F4685-I/SP
Description  28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
PDF  484 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4685-I/SP Datasheet(HTML) 441 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
Preliminary
DS39761B-page 439
PIC18F2682/2685/4682/4685
FIGURE 27-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 27-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Note:
Refer to Figure 27-4 for load conditions.
46
47
45
48
41
42
40
T0CKI
T1OSO/T13CKI
TMR0 or
TMR1
Param
No.
Sym
Characteristic
Min
Max
Units
Conditions
40
TT0H
T0CKI High Pulse Width
No prescaler
0.5 TCY + 20
—
ns
With prescaler
10
—
ns
41
TT0L
T0CKI Low Pulse Width
No prescaler
0.5 TCY + 20
—
ns
With prescaler
10
—
ns
42
TT0P
T0CKI Period
No prescaler
TCY + 10
—
ns
With prescaler
Greater of:
20 ns or
(TCY + 40)/N
—
ns
N = prescale value
(1, 2, 4,..., 256)
45
TT1H
T13CKI High
Time
Synchronous, no prescaler
0.5 TCY + 20
—
ns
Synchronous,
with prescaler
PIC18FXXXX
10
—
ns
PIC18LFXXXX
25
—
ns
VDD = 2.0V
Asynchronous
PIC18FXXXX
30
—
ns
PIC18LFXXXX
50
—
ns
VDD = 2.0V
46
TT1L
T13CKI Low
Time
Synchronous, no prescaler
0.5 TCY + 5
—
ns
Synchronous,
with prescaler
PIC18FXXXX
10
—
ns
PIC18LFXXXX
25
—
ns
VDD = 2.0V
Asynchronous
PIC18FXXXX
30
—
ns
PIC18LFXXXX
50
—
ns
VDD = 2.0V
47
TT1P
T13CKI Input
Period
Synchronous
Greater of:
20 ns or
(TCY + 40)/N
—
ns
N = prescale value
(1, 2, 4, 8)
Asynchronous
60
—
ns
FT1
T13CKI Oscillator Input Frequency Range
DC
50
kHz
48
TCKE2TMRI Delay from External T13CKI Clock Edge to
Timer Increment
2 TOSC
7 TOSC
—



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