參數(shù)資料
型號: DS2490Y
廠商: Maxim Integrated Products
文件頁數(shù): 41/50頁
文件大?。?/td> 0K
描述: IC BRIDGE CLIP USB TO 1-W 24SOIC
標(biāo)準(zhǔn)包裝: 1,000
應(yīng)用: USB
接口: 1 線
電源電壓: 3 V ~ 5.5 V
封裝/外殼: 24-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 24-SOIC W
包裝: 管件
安裝類型: 表面貼裝
DS2490
46 of 50
COMMUNICATION COMMANDS
SEARCH ACCESS
Setup Packet Encoding:
bmRequestType
0x40
bRequest
COMM_CMD
wValue
byte 2
byte 1
byte 2:
0
RTS
0
F
NTF
ICP
RST
byte 1:
1
SM
1
0
IM
wIndex
byte 2
byte 1
byte 2 – number of devices. Maximum number of devices to be
discovered in a single command call. A value of 0x00 indicates that
all devices on the 1-Wire Network are to be discovered.
byte 1 – 1-Wire command:
Command to be used for addressing a 1-Wire device. Valid codes:
0xF0 (Search ROM)
0xEC (Conditional Search ROM)
wLength
0x0000
APPENDIX 3: DS2490 MODE COMMANDS, SETUP PACKET ENCODING
MODE COMMANDS
ENABLE PULSE
Setup Packet Encoding:
bmRequestType
0x40
bRequest
MODE_CMD
wValue
MOD_PULSE_EN
wIndex
byte 2
byte 1
byte 2 – 0x00
byte 1:
0
SPUE
0
Strong pullup is enabled with SPUE = 1, disabled with SPUE = 0.
wLength
0x0000
ENABLE SPEED CHANGE
Setup Packet Encoding:
bmRequestType
0x40
bRequest
MODE_CMD
wValue
MOD_SPEED_CHANGE_EN
wIndex
byte 2
byte 1
byte 2 – 0x00
byte 1 – Boolean value. Speed changes are enabled with TRUE,
disabled with FALSE.
wLength
0x0000
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