參數(shù)資料
型號: MPC8544ECVTAQFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
封裝: 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù): 37/120頁
文件大小: 1321K
代理商: MPC8544ECVTAQFB
MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
23
DUART
7DUART
This section describes the DC and AC electrical specifications for the DUART interface of the
MPC8544E.
7.1
DUART DC Electrical Characteristics
Table 19 provides the DC electrical characteristics for the DUART interface.
7.2
DUART AC Electrical Specifications
Table 20 provides the AC timing parameters for the DUART interface.
Table 19. DUART DC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
Notes
High-level input voltage
VIH
2OVDD + 0.3
V
Low-level input voltage
VIL
–0.3
0.8
V
Input current (VIN = 0 V or VIN = VDD)IIN
—±5
μA1
High-level output voltage (OVDD = min, IOH = –2 mA)
VOH
2.4
V
Low-level output voltage (OVDD = min, IOL = 2 mA)
VOL
—0.4
V
Note:
1. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.
Table 20. DUART AC Timing Specifications
Parameter
Value
Unit
Notes
Minimum baud rate
CCB clock/1,048,576
baud
1
Maximum baud rate
CCB clock/16
baud
2
Oversample rate
16
3
Notes:
1. CCB clock refers to the platform clock.
2. Actual attainable baud rate will be limited by the latency of interrupt processing.
3. The middle of a start bit is detected as the eighth sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values
are sampled each sixteenth sample.
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