Datasheet

© 2011 Microchip Technology Inc. DS61143H-page 167
PIC32MX3XX/4XX
FIGURE 29-6: TIMER1, 2, 3, 4, 5 EXTERNAL CLOCK TIMING CHARACTERISTICS
Note: Refer to Figure 29-1 for load conditions.
Tx11
Tx15
Tx10
Tx20
TMRx
OS60
TxCK
TABLE 29-23: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
(1)
AC CHARACTERISTICS
Standard Operating Conditions: 2.3V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ TA ≤ +105°C for V-Temp
Param.
No.
Symbol Characteristics
(2)
Min. Typical Max. Units Conditions
TA10 TTXHTxCK
High Time
Synchronous,
with prescaler
[(12.5 ns or 1T
PB)/N]
+ 25 ns
— — ns Must also meet
parameter TA15.
Asynchronous,
with prescaler
10 — — ns —
TA11 T
TXLTxCK
Low Time
Synchronous,
with prescaler
[(12.5 ns or 1TPB)/N]
+ 25 ns
— — ns Must also meet
parameter TA15.
Asynchronous,
with prescaler
10 — — ns —
TA15 TTXPTxCK
Input Period
Synchronous,
with prescaler
[(Greater of 25 ns or
2TPB)/N] + 30 ns
——ns
V
DD > 2.7V
[(Greater of 25 ns or
2TPB)/N] + 50 ns
——ns
V
DD < 2.7V
Asynchronous,
with prescaler
20 — — ns
V
DD > 2.7V
(Note 3)
50 — — ns
V
DD < 2.7V
(Note 3)
OS60 FT1 SOSC1/T1CK Oscillator
Input Frequency Range
(oscillator enabled by
setting TCS bit
(T1CON<1>))
32 — 100 kHz —
TA20 T
CKEXTMRL Delay from External TxCK
Clock Edge to Timer
Increment
—1TPB —
Note 1: Timer1 is a Type A.
2: This parameter is characterized, but not tested in manufacturing.
3: N = prescale value (1, 8, 64, 256)