Datasheet

dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
DS70616F-page 514 Preliminary © 2009-2012 Microchip Technology Inc.
FIGURE 32-6: TIMER1-TIMER9 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 32-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 32-23: 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
-40°C ≤T
A ≤+125°C for Extended
Param. Symbol Characteristic
(2)
Min. Typ. Max. Units Conditions
TA10 T
TXH TxCK High
Time
Synchronous
mode
Greater of:
20 or
(T
CY + 20)/N
——ns
Must also meet
parameter TA15
N = prescaler
value (1, 8, 64,
256)
Asynchronous 35 — — ns —
TA11 T
TXLTxCK Low
Time
Synchronous
mode
Greater of:
20 or
(T
CY + 20)/N
— — ns Must also meet
parameter TA15
N = prescaler
value (1, 8, 64,
256)
Asynchronous 10 — — ns —
TA15 T
TXP TxCK Input
Period
Synchronous
mode
Greater of:
40 or
(2 T
CY + 40)/N
— — ns N = prescale
value
(1, 8, 64, 256)
OS60 Ft1 SOSC1/T1CK Oscillator
Input frequency Range
(oscillator enabled by set-
ting 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 ns —
Note 1: Timer1 is a Type A.
2: These parameters are characterized, but are not tested in manufacturing.