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参数资料
| 型号： | DS2480S |
| 英文描述： | Serial 1.Wire Line Driver |
| 中文描述： | 串行1.Wire线驱动器 |
| 文件页数： | 10/26页 |
| 文件大小： | 185K |
| 代理商： | DS2480S |
DS2480
042498 10/26
CONFIGURATION COMMAND OVERVIEW
Table 3
Parameter Description
Par. Code
C d
Configurable at
Regular
Flexible
Default
Overdrive
Reg./Flex.
Overdrive
Pull–Down Slew Rate Control
001
√
15 V/
μ
s
15 V/
μ
s
Programming Pulse Duration
010
√
√
√
512
μ
s
512
μ
s
Strong Pull–up Duration
011
√
√
√
524 ms
524 ms
Write 1 low time
100
√
8
μ
s
1
μ
s
Data Sample Offset and
Write 0 Recovery Time
101
√
3
μ
s
3
μ
s
1
μ
s
3
μ
s
RS232 Baud Rate
111
√
√
√
9.6k bits/s
9.6k bits/s
The numbers given for parameter 001 (Pull–Down Slew
Rate Control) are nominal values. They may vary as
specified in the Electrical Characteristics section and
are almost independent of the load on the 1–Wire bus.
Information on how to select the optimum value of this
parameter is given in section “Controlled Edges”.
For the parameters 010 (Programming Pulse Duration)
and 011 (Strong Pull–Up Duration) one may select
indefinite duration. This value, however, should only be
selected if one is not going to switch the device to Data
Mode. As long as the device stays in Command Mode,
any pulse function (programming or strong pull–up) that
uses one of these parameters can be terminated by
sending the command code F1h. Termination is not pos-
sible if the device is in Data Mode.
Parameter 111 (RS232 Baud Rate) has two functions. It
selects the baud rate and allows inversion of the signal
at the RXD pin. Using one of the value codes 100 to 111
will set the polarity at RXD to the opposite of what is
defined by the logic level at the POL pin (asymmetry bit,
see Figure 1). This may reduce the component count in
some applications of the device. Note that when chang-
ing the baud rate, the DS2480 will send the command
response byte at the new data rate.
A short explanation on the use of parameters 100 (Write
1 low time) and 101 (Data Sample Offset/Write 0 Recov-
ery Time) is given in the section “Timing Diagrams” later
in this document. The parameter code 110 is reserved
for future extensions; one should not change the value
code from its default setting.
CONFIGURATION PARAMETER VALUE CODES
Table 4
Parameter Code
C d
Value Codes
U i
Unit
000
001
010
011
100
101
110
111
001
(PDSRC)
15
2.2
1.65
1.37
1.1
0.83
0.7
0.55
V/
μ
s
010
(PPD)
32
64
128
256
512
1024
2048
∞
μ
s
011
(SPUD)
16.4
65.5
131
262
524
1048
2096
∞
ms
100
(W1LT)
8
9
10
11
12
13
14
15
μ
s
101
(DSO/W0RT)
3
4
5
6
7
8
9
10
μ
s
111
(RBR)
9.6
19.2
57.6
115.2
9.6
19.2
57.6
115.2
kbits/s
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2482-100 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Single-Channel 1-Wire Master |
| DS2482-100_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master |
| DS2482-101 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-101_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Single-Channel 1-Wire Master with Sleep Mode |
| DS2482-800 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:8-Channel 1-Wire Master |
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