Datasheet

 2013-2014 Microchip Technology Inc. DS70000689D-page 451
dsPIC33EPXXXGM3XX/6XX/7XX
FIGURE 33-6: TIMER1-TIMER5 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 33-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 33-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
(1)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(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
(2)
Min. Typ. Max. Units Conditions
TA10 T
TXH T1CK High
Time
Synchronous
mode
Greater of:
20 or
(TCY + 20)/N
— — ns Must also meet
Parameter TA15,
N = Prescaler value
(1, 8, 64, 256)
Asynchronous 35 — — ns
TA11 T
TXLT1CK Low
Time
Synchronous
mode
Greater of:
20 or
(TCY + 20)/N
— — ns Must also meet
Parameter TA15,
N = Prescaler value
(1, 8, 64, 256)
Asynchronous 10 — — ns
TA15 T
TXP T1CK Input
Period
Synchronous
mode
Greater of:
40 or
(2 T
CY + 40)/N
— — ns N = Prescaler value
(1, 8, 64, 256)
OS60 Ft1 T1CK Oscillator Input
Frequency Range (oscillator
enabled by setting TCS
(T1CON<1>) bit)
DC — 50 kHz
TA20 T
CKEXTMRL Delay from External T1CK
Clock Edge to Timer
Increment
0.75 TCY + 40 — 1.75 TCY + 40 ns
Note 1: Timer1 is a Type A.
2: These parameters are characterized, but are not tested in manufacturing.