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DS1963S Datasheet(PDF) 16 Page - Dallas Semiconductor

Part # DS1963S
Description  SHA iButton
PDF  37 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1963S Datasheet(HTML) 16 Page - Dallas Semiconductor

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DS1963S
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Memory and SHA Function Flow Chart (continued) Figure 7
Y
DS1963S TX "0"
DS1963S TX "1"
Master
TX Reset ?
Master
TX Reset ?
N
N
Y
Y
SHA
Finished ?
N
Bus Master
RX "1"s
SHA Engine computes
Message Authentication Code
of secret of selected page,
data of the selected page,
3 bytes scratchpad data
Serial Number of device and
page W/C Counter, page #,
Y
N
Master TX
Reset?
Master
TX Reset ?
Bus Master RX data byte
from memory address
DS1963S sets memory
address = (T15:T0)
Address
< 200h ?
S
of Command, Address,
Bus Master RX CRC16
data and counter values
Bus Master RX Secret
Counter of selected page
Bus Master RX W/C
Counter of selected page
End
Of Page ?
Y
N
Master
TX Reset ?
Bus Master
RX "1"s
Y
Y
N
N
R
A5h
Read Auth.
Page
?
Bus Master TX
TA1(T7:T0), TA2(T15:T8)
Y
N
AUTH = 0
CHLG = 0
N
Y
Spare
Vertical
From Figure 7
4th part
From Figure 7
6th part
To Figure 7
6th part
To Figure 7
4th part
º
Ù
X = 0 ; M = MATCH
(TA1[7:6]
SEC#[2:1])
T4:T0 = 00000b
DS1963S
address
increments



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