Datasheet

© 2009-2012 Microchip Technology Inc. Preliminary DS70616F-page 515
dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
TABLE 32-24: TIMER2, TIMER4, TIMER6, TIMER8 (TYPE B TIMER) 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 ≤T
A ≤+125°C for Extended
Param. 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
Increment
0.75 TCY + 40 — 1.75 TCY + 40 ns —
Note 1: These parameters are characterized, but are not tested in manufacturing.
TABLE 32-25: TIMER3, TIMER5, TIMER7, TIMER9 (TYPE C TIMER) 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. Symbol Characteristic
(1)
Min. Typ. Max. Units Conditions
TC10 TtxH TxCK High
Time
Synchronous T
CY + 20 — — ns Must also meet
parameter TC15
TC11 TtxL TxCK Low
Time
Synchronous TCY + 20 — — ns Must also meet
parameter TC15
TC15 TtxP TxCK Input
Period
Synchronous,
with prescaler
2 T
CY + 40 — — ns N = prescale
value
(1, 8, 64, 256)
TC20 TCKEXTMRL 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.