Datasheet

dsPIC33FJXXXGPX06/X08/X10
DS70286C-page 272 © 2009 Microchip Technology Inc.
FIGURE 25-5: TIMER1, 2, 3, 4, 5, 6, 7, 8 AND 9 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 25-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 25-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
(1)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
TA10 T
TXH TxCK High Time Synchronous,
no prescaler
0.5 TCY + 20 — — ns Must also meet
parameter TA15
Synchronous,
with prescaler
10 — — ns
Asynchronous 10 — — ns
TA11 T
TXL TxCK Low Time Synchronous,
no prescaler
0.5 TCY + 20 — — ns Must also meet
parameter TA15
Synchronous,
with prescaler
10 — — ns
Asynchronous 10 — — ns
TA15 T
TXP TxCK Input Period Synchronous,
no prescaler
TCY + 40 — — ns —
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
— — — N = prescale
value
(1, 8, 64, 256)
Asynchronous 20 — — ns —
OS60 Ft1 SOSC1/T1CK Oscillator Input
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
0.5 TCY —1.5 TCY ——
Note 1: Timer1 is a Type A.