SEALED ENERGY SYSTEMS
®
12
User Manual
RSOC
LED1
LED2
LED3
LED4
LED5
NOTE
At below 10%
Blinks
11%-20%
Lit for 4
sec
when-
ever
switch is
pressed
21%-40%
41%-60%
61%-80%
81%-100%
3.3.
SMBus and SBD Parameters
3.3.1. Overview of Operations
The battery is fitted with a microprocessor and associated circuitry for
communication with an external host device and/or smart battery
charger. Reference should be made to the following specifications
when reading this section:
System Management Bus Specification (Rev1.1, Dec11, 1998) with
the exception that it is necessary to wait at least 150uS between
battery message transactions.
Smart Battery Data Specification (Rev1.1, Dec15, 1998)
Smart battery Charger Specification (Rev1.0, June27, 1996)
3.3.2. SMBus Logic Levels
SYMBOLS
PARAMETERS
LIMITS
UNITS
MIN MAX
V
il
Data/Clock input low voltage
-0.3
0.8
V
V
ib
Data/Clock input high voltage
2.1
5.5
V
V
ol
Data/Clock output low voltage
0.4
V
3.3.3. SMBus Data Protocols
SMBus Interface complies with SBS Specification Version 1.1.
The battery pack includes a simple bi-directional serial data
interface. A host processor uses the interface to access various
battery pack registers.
The interface uses a command-based protocol, where the
host processor sends the battery address command byte to
the battery pack. The command directs the battery pack to
either store the next data received to a register specified
command byte or output the data specified by the command
byte.
