LTC4110EUHF LINER [Linear Technology], LTC4110EUHF Datasheet - Page 27

• Manufacturer Part Number: LTC4110EUHF
• Description: Battery Backup System Manager
• Manufacturer: LINER [Linear Technology]

OPERATION
Table 5c. GPIO2 Modes
Table 5d. GPIO2 Power Up Mode (SELA = 0.5 • V
Table 5e. GPIO3 Modes
Table 5f. GPIO3 Power Up Mode (SELA = 0.5 • V
SMBUS INTERFACE
All communications over the SMBus are interpreted by the
SMBus interface block. The SMBus interface is a SMBus
slave device. All internal LTC4110 registers may be updated
and accessed through the SMBus interface as required.
The SMBus protocol is a derivative of the I
a complete description of the bus protocol requirements,
reference “The I
ips
1.1,” from the SMBus organization). See Table 6: Register
®
, and “System Management Bus Specifi cation, Version
GPIO_2_EN
GPIO_2_EN
GPIO_3_EN
GPIO_3_EN
0
1
1
1
1
0
1
1
1
1
HOST PROGRAMMED BIT SETTINGS
HOST PROGRAMMED BIT SETTINGS
2
C-Bus and How to Use It, V1.0” by Phil-
FORCED BIT SETTINGS
FORCED BIT SETTINGS
GPIO_2_OUT
GPIO_2_OUT
GPIO_3_OUT
GPIO_3_OUT
0
X
0
1
X
0
X
0
1
X
REF
REF
2
GPIO_2_ BUFLT
GPIO_2_BUFLT
C-Bus
GPIO_3_ CAL
GPIO_3_CAL
)
)
0
1
0
0
1
0
1
0
0
1
TM
. (For
Command Set Description and Table 7: Summary of Sup-
ported SMBus Functions, for complete details.
All data is clocked into the shift register on the rising edge
of SCL. All data is clocked out of the shift register on the
falling edge of SCL. Detection of an SMBus Stop condi-
tion, or power-on reset will reset the SMBus interface to
an initial state at any time. The LTC4110 command set is
interpreted by the SMBus interface and passed onto the
charger controller block as control signals or updates to
internal registers. Smart battery charge commands are
GPIO_2 MODE
GPIO_2 MODE
GPIO_3 MODE
GPIO_3 MODE
Status Output
Digital Output
Digital Output
Status Output
Status Output
Digital Output
Digital Output
Status Output
Digital Input
Digital Input
CAL_COMPLETEb
BKUP_FLTb
BKUP_FLTb
Input Data
Input Data
CHG_FLTb
DATA
DATA
DATA
DATA
0
1
0
1
LTC4110
With Pull-Up
With Pull-Up
With Pull-Up
With Pull-Up
With Pull-Up
With Pull-Up
With Pull-Up
With Pull-Up
GPIO_2_IN
GPIO_3_IN
NOTE
NOTE
NOTE
NOTE
27
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