DSPIC30F2012-30I Datasheet, PDF (167/210 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC30F2011/2012/3012/3013
FIGURE 20-8:
TYPE A, B AND C TIMER EXTERNAL CLOCK TIMING CHARACTERISTICS
TxCK
Tx10
Tx11
TMRX
Tx15
OS60
Note: Refer to Figure 20-3 for load conditions.
Tx20
TABLE 20-23: TYPE A TIMER (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 ≤TA ≤+125°C for Extended
Param
No.
Symbol
Characteristic
Min
Typ Max Units Conditions
TA10 TTXH
TxCK High Time Synchronous, 0.5 TCY + 20 —
—
ns Must also meet
no prescaler
parameter TA15
Synchronous,
10
—
—
ns
with prescaler
Asynchronous
10
—
—
ns
TA11 TTXL
TxCK Low Time Synchronous, 0.5 TCY + 20 —
—
ns Must also meet
no prescaler
parameter TA15
Synchronous,
10
—
—
ns
with prescaler
Asynchronous
10
—
—
ns
TA15 TTXP
TxCK Input Period Synchronous, TCY + 10 —
—
ns
no prescaler
Synchronous, Greater of: —
—
— N = prescale
with prescaler 20 ns or
value
(TCY + 40)/N
(1, 8, 64, 256)
Asynchronous
20
—
—
ns
OS60 Ft1
SOSC1/T1CK oscillator input
DC
frequency range (oscillator enabled
by setting bit TCS (T1CON, bit 1))
—
50 kHz
TA20
TCKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY
— 1.5 TCY —
Note: Timer1 is a Type A.
© 2010 Microchip Technology Inc.
DS70139G-page 167