Datasheet

© 2008-2012 Microchip Technology Inc. DS70318F-page 305
dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04
FIGURE 24-5: TIMER1, 2 AND 3 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 24-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 24-23: 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 ≤ TA ≤ +125°C for Extended
Param
No.
Symbol Characteristic Min. Typ. Max. Units Conditions
TA10 T
TXH TxCK High
Time
Synchronous,
no prescaler
TCY + 20 — — ns Must also meet
parameter
TA15
N = prescale
value (1, 8, 64,
256)
Synchronous,
with prescaler
(T
CY + 20)/N — — ns
Asynchronous 20 — — ns
TA11 T
TXLTxCK Low
Time
Synchronous,
no prescaler
T
CY + 20
— — ns Must also meet
parameter
TA15
N = prescale
value (1, 8, 64,
256)
Synchronous,
with prescaler
(T
CY + 20)/N — — ns
Asynchronous 20 — — ns
TA15 T
TXP TxCK Input
Period
Synchronous,
no prescaler
2 TCY + 40 — — ns —
Synchronous,
with prescaler
Greater of:
40 ns or
(2 T
CY + 40)/N
— — — N = prescale
value (1, 8, 64,
256)
Asynchronous 40 — — ns —
OS60 F
T1 T1CK Oscillator Input Fre-
quency Range (oscillator
enabled by setting bit, TCS
(T1CON<1>))
DC — 50 kHz —
TA20 TCKEXTMRL Delay from External TxCK
Clock Edge to Timer
Increment
0.75 TCY + 40 1.75 TCY + 40 — —
Note 1: Timer1 is a Type A timer.