MPC8321E Freescale Semiconductor, Inc, MPC8321E Datasheet - Page 45

• Manufacturer Part Number: MPC8321E
• Description: Mpc8321e Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

Figure 38
Figure 39
generally reference the rising edge of the clock, these AC timing diagrams also apply when the falling edge
is the active edge.
Figure 39
Freescale Semiconductor
Outputs—Internal clock delay
Outputs—External clock delay
Outputs—Internal clock high impedance
Outputs—External clock high impedance
Inputs—Internal clock input setup time
Inputs—External clock input setup time
Inputs—Internal clock input hold time
Inputs—External clock input hold time
Notes:
1. Output specifications are measured from the 50% level of the rising edge of CLKIN to the 50% level of the signal. Timings
2. The symbols used for timing specifications follow the pattern of t
are measured at the pin.
inputs and t
internal timing (UAI) for the time t
invalid (X).
MPC8323E PowerQUICC™ II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 1
Serial CLK (Input)
Note: The clock edge is selectable.
provides the AC test load.
and
shows the timing with external clock.
Output Signals:
Input Signals:
(first two letters of functional block)(reference)(state)(signal)(state)
(See Note)
(See Note)
Figure 40
Characteristic
Output
represent the AC timing from
Table 52. Synchronous UART AC Timing Specifications
t
HEIVKH
Figure 39. AC Timing (External Clock) Diagram
serial
memory clock reference (K) goes from the high state (H) until outputs (O) are
Figure 38. AC Test Load
Z
0
= 50 Ω
t
HEKHOX
t
HEKHOV
t
HEIXKH
Table
(first two letters of functional block)(signal)(state)(reference)(state)
for outputs. For example, t
51. Note that although the specifications
Symbol
t
t
t
t
t
t
UAEKHOV
UAEKHOX
t
t
UAIKHOV
UAIKHOX
UAEIVKH
UAEIXKH
HDLC, BISYNC, Transparent, and Synchronous UART
UAIIVKH
UAIIXKH
R
L
= 50 Ω
2
OV
Min
0
1
0
1
6
4
0
1
DD
UAIKHOX
1
/2
symbolizes the outputs
Max
5.5
5.5
10
—
—
—
—
8
Unit
ns
ns
ns
ns
ns
ns
ns
ns
for
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