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ATECC508A 데이터시트(PDF) 14 Page - Microchip Technology

부품명 ATECC508A
상세설명  Cryptographic Co-processor with Secure Hardware-Based Key Storage
PDF  109 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATECC508A 데이터시트(HTML) 14 Page - Microchip Technology

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Byte
Name
Description
Write
Read
Bits 1-0: GPIO_Mode (see Section General Purpose I/O Pin).
00 = Disabled. SCL pin is unused should be tied low
on the board.
01 = Authorization modes, bit 3 determines device
operation.
10 = Input. Current value on the SCL pin returned by
Info command.
11 = Output. SCL may be driven high or low by Info
command.
17
Reserved
Reserved. Must be zero.
If Config
unlocked
Always
18
OTPmode
0xAA (Read-only
Mode) =
Writes to the OTP zone are forbidden
when the OTP zone is locked. Reads of
all words are permitted.
0x55 (Consumption
Mode) =
Writes to the OTP zone when the OTP
zone is locked; causes bits to transition
only from a one to a zero. Reads of all
words are permitted.
All other values of OTP mode are reserved and should not be used.
If Config
unlocked
Always
19
ChipMode
Bits 7-3: Must be set to zero.
Bit 2:
Watchdog Duration.
0 =
tWATCHDOG is 1.3s, nominal.
1 =
tWATCHDOG is 10.0s, nominal.
Microchip recommends this be set to zero for the best
security
Bit 1:
TTLenable.
0 =
Input levels use a fixed reference.
1 =
Input levels are VCC referenced.
Bit 0:
SelectorMode.
0 = Selector can always be written with the
UpdateExtra command.
1 = Selector can only be written if it currently has a
value of zero.
If Config
unlocked
Always
20–51 SlotConfig
Two bytes of access and usage permissions and controls for each
slot of the Data zone. See Section SlotConfig (Bytes 20 to 51).
If Config
unlocked
Always
ATECC508A
Device Organization
© 2017 Microchip Technology Inc.
Datasheet Complete
DS20005927A-page 14



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