DS2784 Maxim Integrated Products, DS2784 Datasheet - Page 33

• Manufacturer Part Number: DS2784
• Description: 1-Cell Stand-Alone Fuel Gauge IC
• Manufacturer: Maxim Integrated Products

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Table 11. All Function Commands
Write Challenge
Compute MAC
Without ROM ID and Return
MAC
Compute MAC
With ROM ID and Return MAC
Clear Secret
Compute Next Secret Without
ROM ID
Compute Next Secret With
ROM ID
Lock Secret
Read Data
Write Data
Copy Data
Recall Data
Lock
Set Overdrive
Clear Overdrive
Reset
COMMAND
DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
6C, XX
B8, XX
6A, XX
69, XX
48, XX
HEX
0C
8D
C4
5A
8B
36
35
30
33
60
Writes 64-bit challenge for SHA-1 processing. Required
immediately prior to all Compute MAC and Compute Next Secret
commands.
Computes hash operation of message block with logical 1s in
place of the ROM ID.
Computes hash operation of message block using the ROM ID.
Clears the 64-bit secret to 0000 0000 0000 0000h.
Generates new global secret.
Generates new unique secret.
Sets lock bit to prevent changes to the secret.
Reads data from memory starting at address XX.
Writes data to memory starting at address XX.
Copies shadow RAM data to EEPROM block containing address
XX.
Recalls EEPROM block containing address XX to RAM.
Permanently locks the block of EEPROM
containing address XX.
Sets 1-Wire interface timings to overdrive.
Sets 1-Wire interface timings to standard (factory default).
Resets DS2784 (software POR).
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DESCRIPTION