PIC16F946 Datasheet, PDF (246/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
TABLE 19-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ† 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
Greater of:
—
—
ns N = prescale
20 or TCY + 40
value (2, 4, ...,
N
256)
45* TT1H
T1CKI High Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Time
Synchronous,
3.0-5.5V
15
—
—
ns
with Prescaler
2.0-5.5V
25
—
—
ns
Asynchronous
3.0-5.5V
30
—
—
ns
2.0-5.5V
50
—
—
ns
46* TT1L
T1CKI Low Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Time
Synchronous,
3.0-5.5V
15
—
—
ns
with Prescaler
2.0-5.5V
25
—
—
ns
Asynchronous
3.0-5.5V
30
—
—
ns
2.0-5.5V
50
—
—
ns
47* TT1P
T1CKI Input Synchronous
Period
3.0-5.5V
GREATER OF:
—
—
ns N = prescale
30 OR TCY + 40
value (1, 2, 4, 8)
N
2.0-5.5V 50 OR TCY + 40 —
—
ns
N
Asynchronous
3.0-5.5V
60
—
—
ns
2.0-5.5V
100
—
—
ns
FT1
Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
DC
— 37* kHz
48 TCKEZTMR1 Delay from external clock edge to timer
increment
2 TOSC*
— 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.
FIGURE 19-8:
USART SYNCHRONOUS TRANSMISSION (MASTER/SLAVE) TIMING
RC6/TX/CK
SCK/SCL/SEG9
RC7/RX/DT/
SDI/SDA/SEG8
121
121
120
122
Note: Refer to Figure 19-2 for load conditions.
DS41265A-page 244
Preliminary
© 2005 Microchip Technology Inc.