ABRIDGED DATA SHEET
DS2465
SHA-256 Coprocessor with 1-Wire Master Function
ADDRESS
TYPE
ACCESS
DESCRIPTION
RANGE
00h to 4Bh
4Ch to 5Fh
60h
SRAM
—
R/W
—
W
Input scratchpad
(Reserved)
—
Command register
1-Wire Master Status register
1-Wire Read Data register
61h
SRAM
SRAM
R
62h
R
Refer to the full data sheet.
66h
67h
—
—
(Reserved)
SRAM
SRAM
SRAM
SRAM
SRAM
SRAM
SRAM
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
1-Wire Master Configuration register
68h
1-Wire Port Configuration t
1-Wire Port Configuration t
1-Wire Port Configuration t
1-Wire Port Configuration t
RSTL
MSP
W0L
69h
6Ah
6Bh
REC0
6Ch
1-Wire Port Configuration R
WPU
1-Wire Port Configuration Overdrive t
(Reserved)
6Dh
W1L
6Eh to 6Fh
70h
ROM
R
Factory byte
Refer to the full data sheet.
73h
ROM
—
R
—
Personality byte
(Reserved)
74h to 7Fh
80h to 9Fh
A0h to BFh
C0h to FFh
EEPROM
EEPROM
—
(R)/(W)
(R)/(W)
—
User memory page 0
User memory page 1
(Reserved)
Figure 2. Memory Map
Command Register (60h)
Device Registers
To
execute a 1-Wire
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
function, the DS2465 needs to receive a command from
the I C host. Commands are written one at a time to the
2
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
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.
2
read pointer for the next I C read-access. See section
Function Commands for details.
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