
2006 Microchip Technology Inc.
Preliminary
DS70178C-page 249
dsPIC30F1010/202X
FIGURE 21-6:
TIMER EXTERNAL CLOCK TIMING CHARACTERISTICS
TABLE 21-20: TIMER1 EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.3V and 5.0V (±10%)
(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
TA10
TTXH
TxCK High Time
Synchronous,
no prescaler
0.5 TCY + 20
—
ns
Must also meet
parameter TA15
Synchronous,
with prescaler
10
—
ns
Asynchronous
10
—
ns
TA11
TTXL
TxCK Low Time
Synchronous,
no prescaler
0.5 TCY + 20
—
ns
Must also meet
parameter TA15
Synchronous,
with prescaler
10
—
ns
Asynchronous
10
—
ns
TA15
TTXP
TxCK Input Period Synchronous,
no prescaler
TCY + 10
—
ns
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
——
—
N = prescale
value
(1, 8, 64, 256)
Asynchronous
20
—
ns
OS60
Ft1
SOSC1/T1CK oscillator input
frequency range (oscillator enabled
by setting bit TCS (T1CON, bit 1))
DC
—
50
kHz
TA20
TCKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY
1.5 TCY
—
Tx11
Tx15
Tx10
Tx20
TMRX
OS60
TxCK
Note: “x” refers to Timer Type A or Timer Type B.