Datasheet

dsPIC30F4011/4012
DS70135G-page 194 © 2010 Microchip Technology Inc.
FIGURE 24-7: TIMERx EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 24-2 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 24-22: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.5V to 5.5V (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ T
A ≤ +125°C for Extended
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
TA10 T
TXH T1CK 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 T1CK 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 T1CK Input
Period
Synchronous,
no prescaler
TCY + 10 — — ns
Synchronous,
with prescaler
Greater of:
20 ns or
(T
CY + 40)/N
— — — N = prescale value
(1, 8, 64, 256)
Asynchronous 20 — — ns
OS60 Ft1 SOSCO/T1CK Oscillator
Input frequency Range
(oscillator enabled by setting
bit, TCS (T1CON<1>)
DC — 50 kHz
TA20 T
CKEXTMRL Delay from External T1CK
Clock Edge to Timer
Increment
0.5 TCY —1.5 TCY —