參數(shù)資料
型號(hào): DS2490S
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: Bus Controller
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDSO24
封裝: 0.300 INCH, SO-24
文件頁(yè)數(shù): 37/51頁(yè)
文件大?。?/td> 444K
代理商: DS2490S
DS2490
42 of 50
COMMUNICATION COMMANDS
byte 1:
0
1
0
SE
0
1
IM
wIndex
byte 2
byte 1
byte 2 – 0x00 (unused)
byte 1 – new speed:
0x02 with SE = 1 after Overdrive Skip ROM
0x01 or 0x00 with SE = 1 in all other cases
don’t care with SE = 0
wLength
0x0000
BIT I/O
Setup Packet Encoding:
bmRequestType
0x40
bRequest
COMM_CMD
wValue
byte 2
byte 1
byte 2:
0
CIB
0
SPU
0
NTF
ICP
0
byte 1:
0
1
0
D
0
IM
wIndex
byte 2
byte 1
byte 2 – 0x00 (unused)
byte 1 – 0x00 (unused)
wLength
0x0000
BYTE I/O
Setup Packet Encoding:
bmRequestType
0x40
bRequest
COMM_CMD
wValue
byte 2
byte 1
byte 2:
0
SPU
0
NTF
ICP
0
byte 1:
0
1
0
1
0
1
IM
wIndex
byte 2
byte 1
byte 2 – 0x00 (unused)
byte 1 – data byte to be sent to the 1-Wire bus. To read only, the byte
should be 0xFF.
wLength
0x0000
BLOCK I/O
Setup Packet Encoding:
bmRequestType
0x40
bRequest
COMM_CMD
wValue
byte 2
byte 1
byte 2:
0
SPU
0
NTF
ICP
RST
byte 1:
0
1
0
1
0
IM
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