BQ26100_15 Datasheet, PDF (15/29 Pages) Texas Instruments – Based Security and Authentication IC

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bq26100
SLUS696B – JUNE 2006 – REVISED AUGUST 2015
There is no hardware mapping of the page redirection bytes. The host is responsible for sending the correct
address for a redirected page.
Figure 14. Address 0x0000 PAGE LOCK
FUNCTION
BIT 7
LOCKK1
BIT 6
LOCKK0
BIT 5
RSVD
BIT 4
PAGE 4
BIT 3
PAGE 3
BIT 2
PAGE 2
BIT 1
PAGE 1
BIT 0
PAGE 0
LOCKK1 Programming this bit to 0 locks the upper 64 bits of the device key, preventing additional writes. This
bit can only be written once.
LOCKK0 Programming this bit to 0 locks the lower 64 bits of the device key, preventing additional writes. This
bit can only be written once.
PAGEx Programming this bit to 0 locks page designated by x, preventing additional writes. This bit can only
be programmed once.
Read
Status
Flow
M/F = 0xAA
Write
Status
Flow
M/F = 0x55
(1) _{Master TX:}
16-bit address, A
(1) _{Master TX:}
16-bit address, A
Master RX:
CRC of M/F cmd & A
Master TX:
8-bit data, D
Master RX:
8-bit data @ A
A=A+1
A = 0x0007?
NO
YES
Master RX:
CRC of all data transmitted
Master RX:
CRC of M/F cmd, A & D
Master TX:
Programming Pulse
Master RX:
CRC of preloaded
A[7:0] & shifted D
Master RX:
D
Master TX:
8-bit data, D
CRC = A[7:0]
ROM
Function
Flow
A = 0x0007?
A = A +1
NO
YES
ROM
Function
Flow
(1) 16-Bit address is sent with lower 8-bit address followed by higher 8-bit address with least significant bit first.
Figure 15. Status OTP Write/Read Flows
7.5.2.2 Non-Volatile EEPROM Memory
The EEPROM memory is intended for in-field programming. Programming the EEPROM is no different than
writing to RAM or registers, but the timing between the write and read back is different. A bit can be written to 1
or cleared to 0 multiple times and the value is retained when power to the device is removed.
7.5.2.2.1 General Use – Memory Function Commands 0xE0 (Read) and 0x0E (Write)
Table 5. General Memory Space Addressing
ADDRESSES
0x000F – 0x0000
FUNCTION
16 Bytes general use
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