参数资料
型号: MC8640DHX1250HE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023
封装: 33 X 33 MM, CERAMIC, FCBGA-1023
文件页数: 49/130页
文件大小: 1495K
代理商: MC8640DHX1250HE
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
Freescale Semiconductor
25
DUART
Figure 7 provides the AC test load for the DDR bus.
Figure 7. DDR AC Test Load
7DUART
This section describes the DC and AC electrical specifications for the DUART interface of the MPC8640.
7.1
DUART DC Electrical Characteristics
Table 22 provides the DC electrical characteristics for the DUART interface.
7.2
DUART AC Electrical Specifications
Table 23 provides the AC timing parameters for the DUART interface.
Table 22. 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 and Table 2.
Table 23. DUART AC Timing Specifications
Parameter
Value
Unit
Notes
Minimum baud rate
MPX clock/1,048,576
baud
1,2
Maximum baud rate
MPX clock/16
baud
1,3
Oversample rate
16
1,4
Notes:
1. Guaranteed by design.
2. MPX clock refers to the platform clock.
3. Actual attainable baud rate will be limited by the latency of interrupt processing.
4. 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.
Output
Z0 = 50 Ω
RL = 50 Ω
Dn_GVDD/2
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