Datasheet

dsPIC33FJ06GS001/101A/102A/202A and dsPIC33FJ09GS302
DS75018C-page 288  2011-2012 Microchip Technology Inc.
FIGURE 25-5: TIMER1 AND TIMER2 EXTERNAL CLOCK TIMING CHARACTERISTICS
TABLE 25-23: 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. 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
TCY + 20 — — ns Must also meet
Parameter TA15,
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
(TCY + 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 Ft1 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
0.75 TCY + 40 — 1.75 TCY + 40 —
Note 1: Timer1 is a Type A.
Note: Refer to Figure 25-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK