Microchip Technology MA320002 데이터 시트
© 2011 Microchip Technology Inc.
DS61143H-page 167
PIC32MX3XX/4XX
FIGURE 29-6:
TIMER1, 2, 3, 4, 5 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to
for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 29-23: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
(1)
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature
(unless otherwise stated)
Operating temperature
-40°C
≤ T
A
≤ +85°C for Industrial
-40°C
≤ T
A
≤ +105°C for V-Temp
Param.
No.
Symbol
Characteristics
(2)
Min.
Typical Max. Units
Conditions
TA10
T
TX
H
TxCK
High Time
High Time
Synchronous,
with prescaler
with prescaler
[(12.5 ns or 1T
PB
)/N]
+ 25 ns
—
—
ns
Must also meet
parameter TA15.
parameter TA15.
Asynchronous,
with prescaler
with prescaler
10
—
—
ns
—
TA11
T
TX
L
TxCK
Low Time
Low Time
Synchronous,
with prescaler
with prescaler
[(12.5 ns or 1T
PB
)/N]
+ 25 ns
—
—
ns
Must also meet
parameter TA15.
parameter TA15.
Asynchronous,
with prescaler
with prescaler
10
—
—
ns
—
TA15
T
TX
P
TxCK
Input Period
Input Period
Synchronous,
with prescaler
with prescaler
[(Greater of 25 ns or
2T
PB
)/N] + 30 ns
—
—
ns
V
DD
> 2.7V
[(Greater of 25 ns or
2T
PB
)/N] + 50 ns
—
—
ns
V
DD
< 2.7V
Asynchronous,
with prescaler
with prescaler
20
—
—
ns
V
DD
> 2.7V
(Note 3)
50
—
—
ns
V
DD
< 2.7V
(Note 3)
OS60
F
T
1
SOSC1/T1CK Oscillator
Input Frequency Range
(oscillator enabled by
setting TCS bit
(T1CON<1>))
Input Frequency Range
(oscillator enabled by
setting TCS bit
(T1CON<1>))
32
—
100
kHz
—
TA20
T
CKEXTMRL
Delay from External TxCK
Clock Edge to Timer
Increment
Clock Edge to Timer
Increment
—
1
T
PB
—
Note 1:
Timer1 is a Type A.
2:
This parameter is characterized, but not tested in manufacturing.
3:
N = prescale value (1, 8, 64, 256)