14 Timers
This section describes the DC and AC electrical specifications for the timers.
Timers
14.1 Timer DC Electrical Characteristics
Table 43 provides the DC electrical characteristics for the MPC8349E timer pins, including TIN, TOUT,
TGATE, and RTC_CLK.
Table 43. Timer DC Electrical Characteristics
Characteristic
Input high voltage
Input low voltage
Input current
Output high voltage
Output low voltage
Output low voltage
Symbol
VIH
VIL
IIN
VOH
VOL
VOL
Condition
IOH = –8.0 mA
IOL = 8.0 mA
IOL = 3.2 mA
Min
2.0
–0.3
2.4
—
—
Max
OVDD + 0.3
0.8
±5
—
0.5
0.4
Unit
V
V
μA
V
V
V
14.2 Timer AC Timing Specifications
Table 44 provides the timer input and output AC timing specifications.
Table 44. Timers Input AC Timing Specifications1
Characteristic
Symbol2
Min
Unit
Timers inputs—minimum pulse width
tTIWID
20
ns
Notes:
1. Input specifications are measured from the 50 percent level of the signal to the 50 percent level of the rising edge of CLKIN.
Timings are measured at the pin.
2. Timer inputs and outputs are asynchronous to any visible clock. Timer outputs should be synchronized before use by external
synchronous logic. Timer inputs are required to be valid for at least tTIWID ns to ensure proper operation.
MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
Freescale Semiconductor
49