ltc1760 Linear Technology Corporation, ltc1760 Datasheet - Page 19

• Manufacturer Part Number: ltc1760
• Description: Dual Smart Battery System Manager
• Manufacturer: Linear Technology Corporation

OPERATIO
BATTERY_SYSTEM_REVISION Nibble
The read only BATTERY_SYSTEM_REVISION nibble re-
ports the version of the Smart Battery System Manager
specification supported.
LTC1760 returns 'b1000 for this nibble, indicating Version
1.0 without optional PEC support.
2.3.4 LTC() ('h3c)
Description:
This function returns the LTC Version nibble and allows
the user to perform expanded Smart Battery System
Manager functions.
Purpose:
Used by the SMBus Host to determine the version of the
LTC1760 and to program and monitor TURBO and
POWER_OFF special functions.
SMBus Protocol: Read or Write Word.
Input/Output: word — Refer to “Section 2.2” for bit
mapping.
POWER_OFF Bit
This read/write bit allows the LTC1760 to turn off all power
path sources.
Allowed values:
TURBO Bit
This read/write bit allows the LTC1760 to enter TURBO
charging mode.
Allowed values:
LTC_Version[3:0] Nibble
This read only nibble always returns 'b0001 as the LTC1760
version.
'b1: All power path sources are off.
'b0: All power path sources are enabled. (Power
On Reset Value).
'b1: Turbo Charging mode enabled.
'b0: Turbo Charging mode disabled. (Power On Reset
Value).
U
2.3.5 BatteryMode() ('h03)
Description:
This function is used by the LTC1760 to read the Battery
Mode register.
Purpose:
Allows the LTC1760 to determine if a battery requires a
conditioning/calibration cycle.
SMBus Protocol: Read Word. LTC1760 reads Battery 1 or
Battery 2 as an SMBus Master.
Input/Output: word — Refer to “Section 2.2” for bit
mapping.
CONDITION_FLAG Bit
The CONDITION_FLAG bit is set whenever the battery
requires calibration.
Allowed values:
2.3.6 Voltage() ('h09)
Description:
This function is used by the LTC1760 to read the actual
cell-pack voltage .
Purpose:
Allows the LTC1760 to determine the cell pack voltage and
close the charging voltage servo loop.
SMBus Protocol: Read Word. LTC1760 reads Battery 1 or
Battery 2 as an SMBus Master.
Output: unsigned integer — battery terminal voltage in
milli-volts. Refer to "Section 2.2" for bit mapping.
Units: mV.
Range: 0 to 65,535 mV.
'b1 - Battery requires calibration. (Also known as a
Condition Cycle Request).
'b0 - Battery does not require calibration.
LTC1760
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1760f