Datasheet

© 2009 Microchip Technology Inc. DS70286C-page 273
dsPIC33FJXXXGPX06/X08/X10
TABLE 25-23: TIMER2, TIMER4, TIMER6 AND TIMER8 EXTERNAL CLOCK TIMING
REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
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
TCY + 40 — — ns N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
TB20 T
CKEXT-
MRL
Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY — 1.5 TCY ——
TABLE 25-24: TIMER3, TIMER5, TIMER7 AND TIMER9 EXTERNAL CLOCK TIMING
REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C
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
T
CY + 40 — — ns N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
TC20 T
CKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY —1.5
T
CY
——