参数资料
型号: DS2490S
厂商: Maxim Integrated Products
文件页数: 41/50页
文件大小: 0K
描述: IC BRIDGE CLIP USB TO 1-W 24SOIC
标准包装: 31
应用: USB
接口: 1 线
电源电压: 3 V ~ 5.5 V
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC W
包装: 管件
安装类型: 表面贴装
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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