
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 2
64
Freescale Semiconductor
Timers
14 Timers
This section describes the DC and AC electrical specifications for the timers.
14.1
Timer DC Electrical Characteristics
Table 46 provides the DC electrical characteristics for the MPC8347EA timer pins, including TIN, TOUT,
TGATE, and RTC_CLK.
14.2
Timer AC Timing Specifications
Table 47 provides the timer input and output AC timing specifications.
Table 46. Timer DC Electrical Characteristics
Characteristic
Symbol
Condition
Min
Max
Unit
Input high voltage
VIH
2.0
OVDD+0.3
V
Input low voltage
VIL
-0.3
0.8
V
Input current
IIN
±5
μA
Output high voltage
VOH
IOH = –8.0 mA
2.4
—
V
Output low voltage
VOL
IOL = 8.0 mA
—
0.5
V
Output low voltage
VOL
IOL = 3.2 mA
—
0.4
V
Table 47. Timers Input AC Timing Specifications 1
Characteristic
Symbol 2
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.