Datasheet

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04
DS70318F-page 344 © 2008-2012 Microchip Technology Inc.
TABLE 26-6: 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
MTA10 T
TXH TxCK High
Time
Synchronous,
no prescaler
TCY + 15 — — ns Must also meet
parameter TA15.
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
(T
CY + 15)/N — — ns
Asynchronous 15 — — ns
MTA11 T
TXLTxCK Low
Time
Synchronous,
no prescaler
(TCY + 15) — — ns Must also meet
parameter TA15.
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
(T
CY + 10)/N — — ns
Asynchronous 15 — — ns
MTA15 T
TXP TxCK Input
Period
Synchronous,
no prescaler
2 TCY + 30 — — ns —
Synchronous,
with prescaler
Greater of:
40 ns or
(2 TCY + 30)/N
— — — N = prescale
value
(1, 8, 64, 256)
Asynchronous 30 — — ns —
MOS60 Ft1 SOSCI/T1CK Oscillator
Input frequency Range
(oscillator enabled by set-
ting bit TCS (T1CON<1>))
DC — 50 kHz —
MTA20 T
CKEXTMRL Delay from External TxCK
Clock Edge to Timer Incre-
ment
0.75 TCY + 30 — 1.75 TCY + 30 — —
Note 1: Timer1 is a Type A.