Datasheet

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A = A +1
ROM
Function
Flow
Master TX:
16-bitaddress, A
MasterRX:
CRCofM/Fcmd& A
MasterRX:
D
MasterRX:
8-bitdata@ A
A =0x0001?
YES
Read
Control
Flow
M/F=0x88
NO
A =0x0001?
NO
ROM
Function
Flow
MasterRX:
CRCofM/Fcmd, A &D
MasterRX:
CRCofpreloaded
A[7:0]&shiftedD
YES
Write
Control
Flow
M/F=0x77
Master TX:
16-bitaddress, A
A = A +1
MasterRX:
CRCofalldatatransmitted
Master TX:
8-bitdata,D
Master TX:
8-bitdata,D
CRC=0x01
(1)
(1)
Profile Command
MasterRX:
0x55
ROM
Function
Flow
Profile
M/F=0x99
SLEEP MODE DESCRIPTION
SHA-1 DESCRIPTION
bq26100
SLUS696A – JUNE 2006 – REVISED FEBRUARY 2007
(1) 16-Bit address is sent with lower 8-bit address followed by higher 8-bit address with least significant bit first.
Figure 11. Control Register Write/Read Flows
Pack manufacturers can use the profile command to determine how the device should be programmed.
Figure 12. Profile Command Flow
The bq26100 enters sleep mode when the SDQ enters a stop state or when SDQ encounters an invalid ID.
The SHA-1 is known as a one-way hash function, meaning there is no known mathematical method of
computing the input given only the output. The specification of the SHA-1, as defined by FIPS 180-2, states that
the input consists of 512 bit blocks with a total input length less than 2
64
bits. Inputs which do not conform to
integer multiples of 512 bit blocks are padded before any block is input to the hash function. The SHA-1
algorithm outputs 160 bits, commonly referred to as the digest.
The full SHA-1 specification and algorithm can be found at http://csrc.nist.gov/publications/fips under FIPS 180.
(As of April 23, 2004 the latest revision is FIPS 180-2).
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