Datasheet

7Maxim Integrated
DS2465
DeepCover Secure Authenticator with
SHA-256 Coprocessor and 1-Wire Master Function
ABRIDGED DATA SHEET
Device Registers
The registers of the DS2465 fall into three categories:
write-only, read-only and read/write. Write-only applies to
the command register. Status registers, the 1-Wire read
data register , are
read-only. The configuration registers can be read and
written; they also have defined power-on default settings.
The factory byte, Manufacturer ID, and Personality byte
are read-only.
Command Register (60h)
To execute a 1-Wire
function, the DS2465 needs to receive a command from
the I
2
C host. Commands are written one at a time to the
Command register. Most commands consist of a com-
mand code and a parameter byte. The command code
indicates the type of instruction and the position of the
read pointer for the next I
2
C read-access. See section
Function Commands for details.
Figure 2. Memory Map
ADDRESS
RANGE
TYPE ACCESS DESCRIPTION
00h to 4Bh SRAM R/W Input scratchpad
4Ch to 5Fh — — (Reserved)
60h — W Command register
61h SRAM R 1-Wire Master Status register
62h SRAM R 1-Wire Read Data register
Refer to the full data sheet.
66h — — (Reserved)
67h SRAM R/W 1-Wire Master Configuration register
68h SRAM R/W 1-Wire Port Configuration t
RSTL
69h SRAM R/W 1-Wire Port Configuration t
MSP
6Ah SRAM R/W 1-Wire Port Configuration t
W0L
6Bh SRAM R/W 1-Wire Port Configuration t
REC0
6Ch SRAM R/W 1-Wire Port Configuration R
WPU
6Dh SRAM R/W 1-Wire Port Configuration Overdrive t
W1L
6Eh to 6Fh — — (Reserved)
70h ROM R Factory byte
Refer to the full data sheet.
73h ROM R Personality byte
74h to 7Fh — — (Reserved)
80h to 9Fh EEPROM (R)/(W) User memory page 0
A0h to BFh EEPROM (R)/(W) User memory page 1
C0h to FFh — — (Reserved)