mpc8641 Freescale Semiconductor, Inc, mpc8641 Datasheet - Page 28

• Manufacturer Part Number: mpc8641
• Description: Integrated Host Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

DUART
Figure 7
7
This section describes the DC and AC electrical specifications for the DUART interface of the MPC8641.
7.1
Table 22
7.2
Table 23
28
Minimum baud rate
Maximum baud rate
Oversample rate
Notes:
1. Guaranteed by design.
2. MPX clock refers to the platform clock.
3. Actual attainable baud rate will be limited by the latency of interrupt processing.
4. The middle of a start bit is detected as the 8
sampled each 16
High-level input voltage
Low-level input voltage
Input current
(V
High-level output voltage
(OV
Low-level output voltage
(OV
Note:
1. Note that the symbol V
DUART
IN
provides the AC test load for the DDR bus.
provides the DC electrical characteristics for the DUART interface.
provides the AC timing parameters for the DUART interface.
DUART DC Electrical Characteristics
DUART AC Electrical Specifications
DD
DD
1
= 0 V or V
= min, I
= min, I
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
Parameter
th
sample.
OH
OL
Output
IN
= 100 μA)
= –100 μA)
= V
DD)
IN
Parameter
, in this case, represents the OV
Table 22. DUART DC Electrical Characteristics
Table 23. DUART AC Timing Specifications
Z
0
Figure 7. DDR AC Test Load
th
Symbol
= 50 Ω
sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
V
V
V
V
I
IN
OH
OL
IH
IL
OV
DD
–0.3
Min
IN
—
—
2
– 0.2
symbol referenced in
R
L
= 50 Ω
MPX clock/1,048,576
OV
MPX clock/16
DD
Max
0.8
0.2
±5
—
Dn_GV
+ 0.3
Value
16
Table 1
DD
/2
and
Freescale Semiconductor
Table
Unit
μA
baud
baud
Unit
V
V
V
V
—
2.
Notes
1,2
1,3
1,4