BQ26100_15 Datasheet, PDF (12/29 Pages) Texas Instruments – Based Security and Authentication IC

bq26100
SLUS696B – JUNE 2006 – REVISED AUGUST 2015
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V_prog
Last bit before
programming pulse
V_pull-up
GND
t_pon
Programming
Pulse
Figure 10. bq26100 Device Communication to OTP Programming Pulse Diagram
t_prog
t_rise
t_fall
Figure 11. OTP Programming Pulse Detail
7.5.2 Memory Descriptions
The bq26100 device has a memory and command structure that is compatible with the bq2022, however
additional memory and commands have been added. The bq26100 device uses a combination of non-volatile
One-Time-Programmable (OTP), non-volatile EEPROM, and volatile registers. The memory is split into the
following sections:
7.5.2.1 Non-Volatile OTP Memory
The One Time Programmable (OTP) memory is intended for factory programming. Programming the OTP
requires putting a 7-V pulse on the communication pin after writing the data to the intended address.
7.5.2.1.1 General Use – Memory Function Commands 0xF0 (Read) and 0x0F (Write)
The general use space is erased to read 0x00. Data written to the general space is ORed with data already
present at the address to be written. A bit can only be flipped from 0 to 1.
Table 2. General Memory Space Addressing
ADDRESSES
0x007F – 0x0060
0x005F – 0x0040
0x003F – 0x0020
0x001F – 0x0000
FUNCTION
Page 3 – 32 bytes general use
Page 2 – 32 bytes general use
Page 1 – 32 bytes general use
Page 0 – 32 bytes general use
12
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