Datasheet

© 2010 Microchip Technology Inc. DS70139G-page 167
dsPIC30F2011/2012/3012/3013
FIGURE 20-8: TYPE A, B AND C TIMER EXTERNAL CLOCK TIMING CHARACTERISTICS
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 ≤ 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
(TCY + 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 —
Note: Timer1 is a Type A.
Note: Refer to Figure 20-3 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRX
OS60
TxCK