參數(shù)資料
型號: DS2483Q+T
廠商: Maxim Integrated Products
文件頁數(shù): 2/29頁
文件大?。?/td> 0K
描述: IC I2C TO 1WIRE BRIDGE 8TDFN
產(chǎn)品培訓(xùn)模塊: Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
系列: *
10
Maxim Integrated
DS2483
Single-Channel 1-Wire Master
with Adjustable Timing and Sleep Mode
Port Configuration Register
The Port Configuration register allows verifying the set-
tings for the 1-Wire port (Table 4). The Adjust 1-Wire
Port command positions the read pointer to the Port
Configuration register for the host processor to read
with minimal protocol overhead. When reading the Port
Configuration register, the parameter values are reported
in this sequence:
Parameter 000 (tRSTL) standard speed, overdrive speed
Parameter 001 (tMSP) standard speed, overdrive speed
Parameter 010 (tW0L) standard speed, overdrive speed
Parameter 011 (tREC0)
Parameter 100 (RWPU)
If one continues reading, the parameter number rolls
over to 000 and one receives the same data again.
Note that the upper 4 bits read from the port configura-
tion register are always 0. See Table 7 for the conversion
between parameter value code and actual parameter
value.
Function Commands
The DS2483 understands nine function commands that
fall into four categories: device control, I2C communi-
cation, 1-Wire setup, and 1-Wire communication. The
feedback path to the host is controlled by a read pointer,
which is set automatically by each function command
for the host to efficiently access relevant information.
The host processor sends these commands and appli-
cable parameters as strings of 1 or 2 bytes using the
I2C interface. The I2C protocol requires that each byte
be acknowledged by the receiving party to confirm
acceptance or not be acknowledged to indicate an error
condition (invalid code or parameter) or to end the com-
munication. See the I2C Interface section for details of
the I2C protocol including acknowledge.
The function commands are as follows:
1) Device Reset
2) Set Read Pointer
3) Write Device Configuration
4) Adjust 1-Wire Port
5) 1-Wire Reset
6) 1-Wire Single Bit
7) 1-Wire Write Byte
8) 1-Wire Read Byte
9) 1-Wire Triplet
Table 4. Port Configuration Register Bit Assignment
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0
VAL3
VAL2
VAL1
VAL0
BITS 3:0
VAL[3:0]: Parameter Value Code
See Table 7 for the conversion between binary code and parameter value.
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