Timers
Figure 34 provides the AC test load for PCI.
OVDD/2
Output
Z0 = 50 Ω
RL = 50 Ω
Figure 34. PCI AC Test Load
Figure 35 shows the PCI input AC timing diagram.
CLK
tPCIVKH
tPCIXKH
Input
Figure 35. PCI Input AC Timing Diagram
Figure 36 shows the PCI output AC timing diagram.
CLK
tPCKHOV
tPCKHOX
Output Delay
tPCKHOZ
High-Impedance
Output
Figure 36. PCI Output AC Timing Diagram
14 Timers
This section describes the DC and AC electrical specifications for the timers.
14.1 Timer DC Electrical Characteristics
Table 47 provides the DC electrical characteristics for the MPC8349EA timer pins, including TIN, TOUT,
TGATE, and RTC_CLK.
Table 47. Timer DC Electrical Characteristics
Parameter
Input high voltage
Symbol
Condition
Min
Max
Unit
VIH
VIL
—
2.0
–0.3
—
OVDD + 0.3
V
V
Input low voltage
Input current
—
—
0.8
5
IIN
μA
V
Output high voltage
VOH
IOH = –8.0 mA
2.4
—
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
Freescale Semiconductor
49
FREESCALE [ Freescale ]
