參數(shù)資料
型號(hào): MC9328MX21CVH
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 266 MHz, MICROPROCESSOR, PBGA289
封裝: 17 X 17 MM, 1.45 MM HEIGHT, 0.80 MM PITCH, MAPBGA-289
文件頁(yè)數(shù): 67/106頁(yè)
文件大?。?/td> 1932K
代理商: MC9328MX21CVH
Specifications
MC9328MX21 Product Preview, Rev. 1.1
Freescale Semiconductor
63
Figure 48. Write 1 Timing
Figure 49. Read Timing
The precision of the generated clock is very important to get a proper behavior of the one-wire module.
This module is based on a state machine which undertakes actions at defined times.
The most stringent constraint is 0.0645 as a relative time imprecision.
The time relative precision is directly derived from the frequency of the derivative clock (f):
Time relative precision = 1/f -1 = divider/clock (MHz) - 1
The Table 37 gathers relative time precision for different main clock frequencies.
Table 36. System Timing Requirements
Times
Values
(Microsec)
Minimum
(Microsec)
Maximum
(microsec)
Absolute
Precision
Relative
Precision
RSTL
511
480
31
0.0645
PST
68
60
75
7
0.1
RSTH
512
480
32
0.0645
LOW0
100
60
120
20
0.2
LOWR
5
1
15
4
0.8
READ_sample
13
15
2
0.15
5us
Write “1” Slot 117us
Set WR1/RD
Auto Clear WR1/R
60us
one-wire
5us
BUS
Read Timing
Read “0” Slot 117us
Read “1” Slot 117us
13us
5us
13us
One-Wire samples
Set WR1/RD
Auto Clear WR1/RD Set WR1/RD
Auto Clear WR1/R
(set RDST)
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MC9328MX21CVM 制造商:Freescale Semiconductor 功能描述:Microprocessor