DS2506 - Add-Only Memory (64 kBit), UniqueWare Add-Only Memory (64 kBit)

NAME SYNOPSIS FAMILY CODE SPECIAL PROPERTIES memory pages/page.0 ... pages/page.255 pages/page.ALL STANDARD PROPERTIES ALARMS DESCRIPTION DS2506 DS1986 ADDRESSING DATASHEET SEE ALSO AVAILABILITY AUTHOR

NAME

DS2506, DS2506-UNW − Add-Only Memory (64 kBit), UniqueWare Add-Only Memory (64 kBit)
DS1986, DS1986U

− Add-Only iButton (64 kBit), UniqueWare iButton (64 kBit)

SYNOPSIS

EPROM add-only memory.

0F [.]XXXXXXXXXXXX[XX][/[ memory | pages/page.[0-255|ALL] | ]]

[.]XXXXXXXXXXXX[XX][/[ memory | pages/page.[0-255|ALL] | ]]

FAMILY CODE

	0F		DS2506 DS1986
	8F		DS2506-UNW DS1986U

SPECIAL PROPERTIES

memory

read-write, binary
8192 bytes of memory. Initially all bits are set to 1. Writing zero permanently alters the memory.

pages/page.0 ... pages/page.255 pages/page.ALL

read-write, yes-no
Memory is split into 256 pages of 32 bytes each. ALL is an aggregate of the pages. Each page is accessed sequentially.

DESCRIPTION

DS2506 DS1986

The DS2506 (3) is used for write-once incremental storage. It’s main advantage is for audit trails (i.e. a digital purse).

The DS2506-UNW is one of the UniqueWare class of devices. Some of the memory was preprogramed at the factory. See the datasheet for specifics. The DS2502 , DS2505 , and DS2506 differ in their function by the amount of on-board memory they possess. (The internal protocols are slightly different, but the OWFS system handles this automatically.