DS1922T-F5# Maxim Integrated Products, DS1922T-F5# Datasheet - Page 47

• Manufacturer Part Number: DS1922T-F5#
• Description: IBUTTON TEMP LOGGER
• Manufacturer: Maxim Integrated Products
• Series: iButton®r

Specifications of DS1922T-F5#

• Rohs Information: IButton RoHS Compliance Plan
• Memory Size: 512B
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Assumption: The previous mission has been ended by
using the Stop Mission command. Passwords are not
enabled. The device is a DS1922L.
Starting a mission requires three steps:
To read the result and to verify success, read the addresses 020Ch to 020Fh (results) and the Device Samples
Counter at address 0223h to 0225h. If the count has incremented, the command was executed successfully.
Start Mission with Password
Stop Mission with Password
Forced Conversion
To verify success, read the General Status register at address 0215h. If MIP is 1 and MEMCLR is 0, the command
was executed successfully.
To verify success, read the General Status register at address 0215h. If MIP is 0, the command was executed
successfully.
RST
RST
RST
PD
PD
PD
MASTER MODE
Select
Select
Select
Mission Example: Prepare
and Start a New Mission
Rx
Rx
______________________________________________________________________________________
Tx
Tx
Tx
Tx
Tx
Tx
STP
SM
FC
Temperature Logger iButton with 8KB
FFh
<PW/Dummy>
<PW/Dummy>
FF Loop
FFh
FFh
1-Wire Communication Examples (continued)
FF Loop
FF Loop
DATA (LSB FIRST)
<8 FFh bytes>
(Presence)
(Presence)
(Reset)
(Reset)
CCh
96h
FFh
Step 1: Clear the data of the previous mission.
With only a single device connected to the bus master,
the communication of step 1 looks like this:
Step 1: Clear the data of the previous mission.
Step 2: Write the setup data to register page 1.
Step 3: Start the new mission.
Data-Log Memory
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Clear Memory” command
Send dummy password
Send dummy byte
Reset pulse
Presence pulse
COMMENTS
47