Datasheet

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PIN ASSIGNMENT
2.3mm
4
6
5
3
1
2
Exposed
ThermalPad
3mm
3mm
1.6mm
EEPROM
-ChargePump
DTOP
-SHA-1/HMAC
-SDQ
-CtrlandStatusRegisters
Power
Retification
ATOP
-Oscillator
-LDO
-POR
-OTP PowerComparator
VSS
OTP
PWR
SDQ
FUNCTIONAL DESCRIPTION
bq26100
SLUS696A – JUNE 2006 – REVISED FEBRUARY 2007
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
PWR 1 I/O Power capacitor connection
SDQ 6 I/O Single wire SDQ interface to host
VSS 2, 3, 4, 5 I Ground
FUNCTIONAL BLOCK DIAGRAM
The bq26100 provides the same basic functionality as the bq2022 with added battery pack/accessory
authentication functions. In addition to four 32-byte pages of general use One Time Programmable (OTP)
non-volatile memory available on the bq2022, the bq26100 adds a fifth 32-byte page of OTP and a 16-byte page
of EEPROM to be used at the host system designer’s discretion. An external high voltage is required for
programming the OTP, but not necessary for programming the EEPROM.
A modified form of the SHA-1/HMAC provides the authentication function of the bq26100. Both the host and the
bq26100 share two 64-bit keys used in the authentication calculation. To authenticate a battery pack, the host
5
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