mpc8309 Freescale Semiconductor, Inc, mpc8309 Datasheet - Page 39

• Manufacturer Part Number: mpc8309
• Description: Powerquicc Ii Pro Integrated Communications Processor Family Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

13 DUART
This section describes the DC and AC electrical specifications for the DUART interface of the MPC8309.
13.1
Table 37
13.2
Table 38
Freescale Semiconductor
Minimum baud rate
Maximum baud rate
Oversample rate
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
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:
1. Note that the symbol V
sampled each 16
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0
provides the DC electrical characteristics for the DUART interface of the MPC8309.
provides the AC timing parameters for the DUART interface of the MPC8309.
DUART DC Electrical Characteristics
DUART AC Electrical Specifications
th
IN
sample.
OV
Parameter
Parameter
IN
OL
OH
DD
, in this case, represents the OV
DD
= 100 A
= –100 A
)
1
Table 37. DUART DC Electrical Characteristics
Table 38. DUART AC Timing Specifications
th
sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
IN
symbol referenced in
Symbol
>1,000,000
V
V
V
V
I
OH
OL
IN
IH
IL
Value
256
16
OV
Table 1
DD
–0.3
Min
—
—
2
– 0.2
and
baud
baud
Unit
Table
—
OV
2.
DD
Max
0.8
0.2
±5
—
+ 0.3
Notes
1
2
Unit
DUART
A
V
V
V
V
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