Datasheet

© 2006 Microchip Technology Inc. Preliminary DS70178C-page 249
dsPIC30F1010/202X
FIGURE 21-6: TIMER EXTERNAL CLOCK TIMING CHARACTERISTICS
TABLE 21-20: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.3V and 5.0V (±10%)
(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 TTXP 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 TCKEXTMRL 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 21-1 for load conditions.