mpc8378 Freescale Semiconductor, Inc, mpc8378 Datasheet - Page 22

• Manufacturer Part Number: mpc8378
• Description: Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

DUART
Figure 6
7
This section describes the DC and AC electrical specifications for the DUART interface of the
MPC8377E.
7.1
Table 22
7.2
Table 23
22
Minimum baud rate
Maximum baud rate
Oversample rate
Notes:
1
2
High-level input voltage
Low-level input voltage OV
High-level output voltage,
I
Low-level output voltage,
I
Input current,
(0 V ≤V
Note:
OH
OL
• The symbol V
Actual attainable baud rate will be limited by the latency of interrupt processing.
The middle of a start bit is detected as the 8
sampled each 16
= 100 μA
= –100 μA
IN
DUART
≤ OV
provides the AC test load for the DDR bus.
provides the DC electrical characteristics for the DUART interface of the device.
provides the AC timing parameters for the DUART interface of the device.
DUART DC Electrical Characteristics
DUART AC Electrical Specifications
DD
IN
Parameter
)
, in this case, represents the OV
th
sample.
Output
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
DD
Parameter
Table 22. DUART DC Electrical Characteristics
Table 23. DUART AC Timing Specifications
Z
0
th
Figure 6. DDR AC Test Load
= 50 Ω
sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
Symbol
IN
V
V
V
V
I
OH
OL
IN
symbol referenced in
IH
IL
OV
DD
–0.3
Min
—
—
2
R
– 0.2
L
Table
= 50 Ω
> 1,000,000
Value
2.
256
16
GVDD/2
OV
DD
Max
±30
0.8
0.2
—
+ 0.3
baud
baud
Unit
—
Freescale Semiconductor
Unit
μA
V
V
V
V
Notes
—
1
2