DS2490Y Maxim Integrated Products, DS2490Y Datasheet - Page 20

• Manufacturer Part Number: DS2490Y
• Description: IC BRIDGE CLIP USB TO 1-W 24SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS2490Y

• Applications: USB
• Interface: 1-Wire
• Voltage - Supply: 3 V ~ 5.5 V
• Package / Case: 24-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Communication Command Set Descriptions:
SET DURATION—This command changes the State Register pulse duration value for the strong pullup.
The new duration value is loaded into the duration register as detailed in Appendix 2. The duration value
can alternatively be changed using a Mode command. The new duration setting remains effective until
changed by another SET DURATION or MODE Command. See section “MODE COMMANDS” for
duration parameter value setting.
Note:
An infinite duration pulse is terminated by using either of the HALT EXECUTION Control commands.
To resume 1-Wire activity after the termination, use the RESUME EXECUTION Control command.
PULSE—This command is used to generate a strong pullup to 5V in order to provide extra power for an
attached iButton device, e.g., temperature sensor, EEPROM, SHA-1, or crypto iButton. The pulse
duration is determined by the value in the mode register.
Command parameters:
EP2 data:
EP3 data:
Result Register:
Command parameters:
EP2 data:
EP3 data:
Result Register:
1 byte specifying the new duration.
None, this command gets its input data as a command parameter.
None
If ICP = 1: no result data is generated.
If ICP = 0 and NTF = 1: a result value of 0x00 will be generated.
If IPC = 0 and NTF = 0: no result data is generated since there are no
error codes associated with this command.
None
None
None
Code
0x00
None
None
20 of 50
Condition
ICP = 0, NTF = 1: no error detected
ICP = 0, NTF = 0: no error detected
ICP = 1