參數(shù)資料
型號(hào)： DS2480
廠商： Maxim Integrated Products, Inc.
英文描述： Serial 1-Wire Line Driver(1線串行線驅(qū)動(dòng)器)
中文描述： 串行、1-Wire線驅(qū)動(dòng)器
文件頁(yè)數(shù)： 6/26頁(yè)
文件大?。?/td> 191K
代理商： DS2480
DS2480
042498 6/26
COMMUNICATION COMMAND CODES
Table 1
FUNCTION
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3, BIT 2
BIT 1
BIT 0
Single Bit
1
0
0
0 = write 0
1 = write 1
00
01
10
11
reg. speed
flex. speed
OD. speed
reg. speed
See Text
1
Search
Accelerator
Control
1
0
1
0 = accelerator off
1 = accelerator on
See Text
00
01
10
11
reg. speed
flex. speed
OD. speed
reg. speed
0
1
Reset
1
1
0
(don’t care)
00
01
10
11
reg. speed
flex. speed
OD. speed
reg. speed
0
1
Pulse
1
1
1
0 = 5V strong pull–up
1 = 12V prog. pulse
11
pulse
See Text
1
COMMUNICATION COMMAND RESPONSE
Table 2
FUNCTION
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Single Bit
1
0
0
same as sent
1–Wire read back,
both bits same value
Reset
1
1
See
Text
0
1
0
00 = 1–Wire shorted
01 = presence pulse
10 = alarming presence
pulse
11 = no presence pulse
Pulse
1
1
1
same as sent
undefined
(The Search Accelerator Control command does not generate a response byte.)
Reset
The Reset command must be used to begin all 1–Wire
communication. The speed selection included in the
command code immediately takes effect. The response
byte includes a code for the reaction on the 1–Wire bus
(bits 0 and 1) and a code for the chip revision (bits 2 to 4).
If bit 5 of the response byte reads ‘1’, a programming
voltage is present on the V
PP
pin, indicating that one
may try programming EPROM devices.
Single Bit
The Single Bit command is used to generate a single
time slot on the 1–Wire bus at the speed indicated by
bits 2 and 3. The type of the time slot (write zero or write
one) is determined by the logic value of bit 4. A read data
time slot is identical to the write one time slot. Bits 0 and
1 of the response byte transmitted by the DS2480 at the
end of the time slot reveal the value found on the 1–Wire
bus when reading.
For a time slot without a subsequent strong pull–up, bit 1
of the command must be set to 0. For a time slot immedi-
ately followed by a strong pull–up bit 1 must be set to 1.
As soon as the strong pull–up is over, the device will
send a second response byte, code EFh (read 1) or ECh
(read 0), depending on the value found on the 1–Wire
bus when reading. The strong pull–up directly following
the single bit is used in conjunction with the Crypto
iButton.
Search Accelerator Control
The Search Accelerator Control command is used to set
or reset the Search Accelerator control flag. Bit 4 of the
command code contains the state to which the acceler-
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參數(shù)描述
DS2480B 功能描述:緩沖器和線路驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
DS2480B 制造商:Maxim Integrated Products 功能描述:IC SERIAL LINE DRIVER 2480 SOIC8
DS2480B/T&R 功能描述:緩沖器和線路驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
DS2480B+ 功能描述:緩沖器和線路驅(qū)動(dòng)器 Serial - 1-Wire Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
DS2480B+R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver
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