Datasheet

dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
DS70291G-page 376 © 2007-2012 Microchip Technology Inc.
TABLE 31-23: TIMER2 AND TIMER4 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
-40°C ≤ TA ≤ +125°C for Extended
Param
No.
Symbol Characteristic
(1)
Min Typ Max Units Conditions
TB10 TtxH TxCK High
Time
Synchronous
mode
Greater of:
20 or
(T
CY + 20)/N
——ns
Must also meet
parameter TB15
N = prescale
value
(1, 8, 64, 256)
TB11 TtxL TxCK Low
Time
Synchronous
mode
Greater of:
20 or
(T
CY + 20)/N
— — ns Must also meet
parameter TB15
N = prescale
value
(1, 8, 64, 256)
TB15 TtxP TxCK
Input
Period
Synchronous
mode
Greater of:
40 or
(2 T
CY + 40)/N
— — ns N = prescale
value
(1, 8, 64, 256)
TB20 T
CKEXTMRL Delay from External TxCK
Clock Edge to Timer Incre-
ment
0.75 TCY + 40 — 1.75 TCY + 40 ns —
Note 1: These parameters are characterized, but are not tested in manufacturing.
TABLE 31-24: TIMER3 AND TIMER5 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
-40°C ≤ TA ≤ +125°C for Extended
Param
No.
Symbol Characteristic
(1)
Min Typ Max Units Conditions
TC10 TtxH TxCK High
Time
Synchronous TCY + 20 — — ns Must also meet
parameter TC15
TC11 TtxL TxCK Low
Time
Synchronous T
CY + 20 — — ns Must also meet
parameter TC15
TC15 TtxP TxCK Input
Period
Synchronous,
with prescaler
2 TCY + 40 — — ns —
TC20 T
CKEXTMRL Delay from External TxCK
Clock Edge to Timer
Increment
0.75 TCY + 40 — 1.75 TCY + 40 ns —
Note 1: These parameters are characterized, but are not tested in manufacturing.