Freescale Semiconductor MPC830x PowerQUICC II Pro Processor Evaluation Kit MPC8309-KIT MPC8309-KIT Fiche De Données
Codes de produits
MPC8309-KIT
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 2
36
Freescale Semiconductor
DUART
13 DUART
This section describes the DC and AC electrical specifications for the DUART interface of the MPC8309.
13.1
DUART DC electrical characteristics
The following table provides the DC electrical characteristics for the DUART interface of the MPC8309.
13.2
DUART AC electrical specifications
The following table provides the AC timing parameters for the DUART interface of the MPC8309.
Table 35. 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 OV
DD
V
IL
–0.3
0.8
V
High-level output voltage, I
OH
= –100
μA
V
OH
OV
DD
– 0.2
—
V
Low-level output voltage, I
OL
= 100
μA
V
OL
—
0.2
V
Input current (0 V
≤ V
IN
≤ OV
DD
)
1
I
IN
—
±5
μA
Note:
1. Note that the symbol V
IN
, in this case, represents the OV
IN
and
Table 36. DUART AC timing specifications
Parameter
Value
Unit
Note
Minimum baud rate
256
baud
—
Maximum baud rate
>1,000,000
baud
1
Oversample rate
16
—
2
Notes:
1. Actual attainable baud rate is limited by the latency of interrupt processing.
2. The middle of a start bit is detected as the 8
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.