参数资料
型号: MPC8540VTAQFB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 667 MHz, MICROPROCESSOR, PBGA783
封装: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, LEAD FREE, FLIP CHIP, PLASTIC, BGA-783
文件页数: 19/104页
文件大小: 1216K
代理商: MPC8540VTAQFB
MPC8540 Integrated Processor Hardware Specifications, Rev. 4.1
Freescale Semiconductor
21
DUART
7 DUART
This section describes the DC and AC electrical specifications for the DUART interface of the MPC8540.
7.1 DUART DC Electrical Characteristics
Table 19 provides the DC electrical characteristics for the DUART interface of the MPC8540.
7.2 DUART AC Electrical Specifications
Table 20 provides the AC timing parameters for the DUART interface of the MPC8540.
Table 19. DUART DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
High-level input voltage
VIH
2OVDD + 0.3
V
Low-level input voltage
VIL
–0.3
0.8
V
Input current
(VIN
1 = 0 V or V
IN = VDD)
IIN
—±5
μA
High-level output voltage
(OVDD = min, IOH = –100 μA)
VOH
OVDD – 0.2
V
Low-level output voltage
(OVDD = min, IOL = 100 μA)
VOL
—0.2
V
Note:
1.Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1
Table 20. DUART AC Timing Specifications
Parameter
Value
Unit
Notes
Minimum baud rate
fCCB_CLK / 1048576
baud
3
Maximum baud rate
fCCB_CLK / 16
baud
1, 3
Oversample rate
16
2, 3
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 8th sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit
values are sampled each 16th sample.
3.Guaranteed by design.
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