Datasheet

© 2011 Microchip Technology Inc. DS70118J-page 163
dsPIC30F2010
FIGURE 22-7: TIMER EXTERNAL CLOCK TIMING CHARACTERISTICS
TABLE 22-22: 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 TxCK 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 TxCK 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 TxCK 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 SOSC1/T1CK oscillator input
frequency range (oscillator enabled
by setting bit TCS (T1CON, bit 1))
DC — 50 kHz —
TA20 T
CKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY — 1.5 TCY ——
Tx11
Tx15
Tx10
Tx20
TMRX
OS60
TxCK
Note: “x” refers to Timer Type A or Timer Type B.
Refer to Figure 22-2 for load conditions.