参数资料
型号: DS2490
英文描述: USB to 1-Wire Bridge Chip
中文描述: USB与1-Wire桥接芯片
文件页数: 41/50页
文件大小: 530K
代理商: DS2490
DS2490
41 of 50
033199
TYPE
TYPE=1 specifies programming pulse duration.
TYPE=0 specifies strong pullup duration.
Z=1 checks if the 0-bits in the byte to be written are 0-bits in the byte read back form
the device.
Z=0 checks if the byte to be written is identical to the one read back from the device.
Z
COMMUNICATION COMMANDS
ERROR ESCAPE
If an error condition was detected, host intervention is required to
recover from the ERROR ESCAPE state. If no error occurred, the
command is processed as a NO OPERATION.
Setup Packet Encoding:
bmRequestType
0x40
COMM_CMD
bRequest
wValue
byte 2
byte 1
1
0
byte 2:
byte 1:
0x0000
0x0000
0
0
0
0
0
0
0
0
F
0
1
0
RST
1
wIndex
wLength
SET DURATION
Setup Packet Encoding:
bmRequestType
0x40
COMM_CMD
bRequest
wValue
byte 2
byte 1
0
0
byte 1
byte 2:
byte 1:
0
0
0
0
0
0
0
1
0
ICP
1
0
TYPE
IM
wIndex
byte 2
byte 2 – 0x00 (unused)
byte 1 – new duration:
Unsigned 8-bit binary number specifying the new duration. See
MODE CONTROL section for byte bit weighting and additional
format information.
0x0000
wLength
PULSE
Setup Packet Encoding:
bmRequestType
0x40
COMM_CMD
bRequest
wValue
byte 2
byte 1
0
0
byte 2:
byte 1:
0x0000
0x0000
0
0
0
0
0
1
0
1
F
ICP
0
0
TYPE
IM
wIndex
wLength
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