PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 353

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 26-10:
TABLE 26-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
© 2007 Microchip Technology Inc.
Param
40
41
42
45
46
47
48
No.
Note:
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
Tcke2tmrI Delay from External T13CKI Clock Edge to
T1OSO/T13CKI
Symbol
TMR0 or
Refer to Figure 26-5 for load conditions.
T0CKI
TMR1
T13CKI
T13CKI
T13CKI
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
High Time
Low Time
Input
Period
T13CKI Oscillator Input Frequency Range
Timer Increment
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous
Asynchronous
Characteristic
40
45
No prescaler
With prescaler
No prescaler
With prescaler
No prescaler
With prescaler
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
Preliminary
42
47
PIC18F4321 FAMILY
0.5 T
0.5 T
0.5 T
(T
(T
0.5 T
Greater of:
Greater of:
T
CY
20 ns or
20 ns or
CY
41
2 T
CY
46
Min
DC
CY
10
CY
10
CY
60
+ 40)/N
10
25
30
50
10
25
30
50
+ 40)/N
CY
OSC
+ 10
+ 20
+ 20
+ 20
+ 5
7 T
Max
50
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OSC
48
Units Conditions
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
DS39689E-page 351
N = prescale
value
(1, 2, 4,..., 256)
V
V
V
V
N = prescale
value (1, 2, 4, 8)
DD
DD
DD
DD
= 2.0V
= 2.0V
= 2.0V
= 2.0V