Datasheet

dsPIC30F2011/2012/3012/3013
DS70139G-page 168 © 2010 Microchip Technology Inc.
TABLE 20-24: TYPE B TIMER (TIMER2 AND TIMER4) 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
TB10
TtxH
TxCK High Time Synchronous,
no prescaler
0.5 T
CY + 20 — — ns Must also meet
parameter TB15
Synchronous,
with prescaler
10 — — ns
TB11 TtxL TxCK Low Time Synchronous,
no prescaler
0.5 T
CY + 20 — — ns Must also meet
parameter TB15
Synchronous,
with prescaler
10 — — ns
TB15 TtxP TxCK Input Period Synchronous,
no prescaler
T
CY + 10 — — ns N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(T
CY + 40)/N
TB20 T
CKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY — 1.5 TCY —
Note: Timer2 and Timer4 are Type B.
TABLE 20-25: TYPE C TIMER (TIMER3 AND TIMER5) 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
TC10
TtxH
TxCK High Time Synchronous 0.5 T
CY + 20 — — ns Must also meet
parameter TC15
TC11 TtxL TxCK Low Time Synchronous 0.5 T
CY + 20 — — ns Must also meet
parameter TC15
TC15 TtxP TxCK Input Period Synchronous,
no prescaler
TCY + 10 — — ns N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
TC20 TCKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY —1.5
T
CY
—
Note: Timer3 and Timer5 are Type C.