MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
20
Freescale Semiconductor
DUART
7
DUART
This section describes the DC and AC electrical specifications for the DUART interface of the
MPC8349E.
7.1
DUART DC Electrical Characteristics
Table 17
provides the DC electrical characteristics for the DUART interface of the MPC8349E.
7.2
DUART AC Electrical Specifications
Table 18
provides the AC timing parameters for the DUART interface of the MPC8349E.
Table 17. DUART DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
High-level input voltage
V
IH
2
OV
DD
+ 0.3
V
Low-level input voltage
V
IL
–0.3
0.8
V
Input current (0.8 V
≤
V
IN
≤
2 V)
I
IN
—
±5
μ
A
High-level output voltage, I
OH
= –100
μ
A
V
OH
OV
DD
– 0.2
—
V
Low-level output voltage, I
OL
= 100
μ
A
V
OL
—
0.2
V
Table 18. DUART AC Timing Specifications
Parameter
Value
Unit
Notes
Minimum baud rate
256
baud
Maximum baud rate
>1,000,000
baud
1
Oversample rate
16
—
2
Notes:
1. Actual attainable baud rate will be limited by the latency of interrupt processing.
2. The middle of a start bit is detected as the 8
th
sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
sampled each 16
th
sample.