PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 515

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 30-8:
TABLE 30-16: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
 2011 Microchip Technology Inc.
Param
40
41
42
45
46
47
48
Note 1:
No.
T
T
T
T
T
T
F
T
Note:
CKE
Symbol
T
T
T
T
T
T
T
T1OSO/T1CKI
0H
0L
0P
1H
1L
1P
1
The Timer1 oscillator is designed to drive 32.768 kHz crystals. When T1CKI is used as a digital input,
frequencies up to 12 MHz are supported.
2
TMR
TMR0 or
T0CKI
TMR1
I Delay from External T1CKI Clock Edge to
Refer to
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T1CKI/T3CKI
High Time
T1CKI/T3CKI
Low Time
T1CKI/T3CKI
Input Period
T1CKI Input Frequency Range
Timer Increment
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Figure 30-4
Synchronous, no prescaler
Synchronous, with prescaler
Asynchronous
Synchronous, no prescaler
Synchronous, with prescaler
Asynchronous
Synchronous
Asynchronous
Characteristic
for load conditions.
40
45
(1)
No prescaler
With prescaler
No prescaler
With prescaler
No prescaler
With prescaler
42
47
PIC18F46J50 FAMILY
0.5 T
0.5 T
(T
0.5 T
(T
0.5 T
Greater of:
Greater of:
41
T
CY
46
20 ns or
20 ns or
CY
2 T
CY
Min
DC
CY
10
CY
10
CY
10
30
10
30
83
+ 40)/N
+ 40)/N
CY
OSC
+ 10
+ 20
+ 20
+ 20
+ 5
7 T
Max
12
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OSC
48
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
DS39931D-page 515
N = prescale
value
(1, 2, 4,..., 256)
N = prescale
value
(1, 2, 4, 8)
Conditions