Microchip Technology MA330019 Data Sheet
© 2007-2012 Microchip Technology Inc.
DS70291G-page 375
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
FIGURE 31-5:
TIMER1, 2 AND 3 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 31-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
(1)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V 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
≤ +125°C for Extended
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
Conditions
TA10
T
TX
H
TxCK High Time Synchronous,
no prescaler
T
CY
+ 20
—
—
ns
Must also meet
parameter TA15.
N = prescale
value
parameter TA15.
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
(T
CY
+ 20)/N
—
—
ns
Asynchronous
20
—
—
ns
TA11
T
TX
L
TxCK Low Time
Synchronous,
no prescaler
(T
CY
+ 20)
—
—
ns
Must also meet
parameter TA15.
N = prescale
value
parameter TA15.
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
(T
CY
+ 20)/N
—
—
ns
Asynchronous
20
—
—
ns
TA15
T
TX
P
TxCK Input
Period
Period
Synchronous,
no prescaler
2 T
CY
+ 40
—
—
ns
—
Synchronous,
with prescaler
Greater of:
40 ns or
(2 T
CY
+ 40)/
N
—
—
—
N = prescale
value
value
(1, 8, 64, 256)
Asynchronous
40
—
—
ns
—
OS60
Ft1
SOSCI/T1CK Oscillator Input
frequency Range (oscillator
enabled by setting bit TCS
(T1CON<1>))
frequency Range (oscillator
enabled by setting bit TCS
(T1CON<1>))
DC
—
50
kHz
—
TA20
T
CKEXTMRL
Delay from External TxCK Clock
Edge to Timer Increment
Edge to Timer Increment
0.75 T
CY
+
40
1.75 T
CY
+
40
—
—
Note 1: Timer1 is a Type A.