BQ2060A_15 Datasheet, PDF (22/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ₁
7
11
8
1
8
1
8
1
ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ S
Battery Address
0001011
0
A Command Code
A
Data Byte Low
A Data Byte High A
ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ _{Write Word}
ÎÎ ÎÎ ÎÎ ₁
7
11
8
11
7
11
ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ _S
Battery Address
0001011
0
A Command Code A
S Battery Address 1
A
8
PEC
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11
AP
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^ÎÎ ₈
1
8
1
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{Data Byte Low A Data Byte High} A
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Read Word
8
PEC
11
AP
ÎÎ ÎÎ ÎÎ ₁
7
11
8
11
7
11
ÎÎ ÎÎ ÎÎ _{S Battery Address 0 A Command Code A S Battery Address 1 A}
ÎÎ ÎÎ ÎÎ 0001011
ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ₈
1
Byte Count = N A
ÎÎÎÎÎÎÎÎÎÎÎÎ ^{ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎ} _{HostProcessor}
ÎÎÎÎÎÎ _bq2060A
8
1
Data Byte 1 A
8
1
Data Byte 2 A
Block Read
A − ACKNOWLEDGE
A − NOT ACKNOWLEDGE
S − START
P − STOP
8
1
Data Byte N A
8
PEC
11
AP
Figure 9. SMBus Communication Protocol with PEC
The final section is used to stop the transmission by returning the HDQ16 pin to a logic-high state by at least the
time t_SSU;B after the negative edge used to start communication. The final logic-high state should be until a period
t_CYCH;B to allow time to ensure that the bit transmission was stopped properly.
If a communication error occurs (e.g., t_CYCB > 250 µs), the host sends the bq2060A a BREAK to reinitiate the
serial interface. The bq2060A detects a BREAK when the HDQ16 pin is in a logic-low state for a time t_B or
greater. The HDQ16 pin is then returned to its normal ready-high logic state for a time t_BR. The bq2060A is then
ready to receive a command from the host processor.
The HDQ16 pin is open drain and requires an external pullup resistor.
Command Codes
The SMBus Command Codes are in ( ), the HDQ16 in [ ]. Temperature(), Voltage(), Current(), and
AverageCurrent(), performance specifications are at regulated V_CC(V_RO) and a temperature of 0–70°C.
ManufacturerAccess() (0x00); [0x00–0x01]
Description: This function provides writable command codes to control the bq2060A during normal operation
and pack manufacture. These commands can be ignored if sent within one second after a device reset. The
following list of commands are available.
0x0618 Enable Low-Power Storage Mode: Activates the low-power storage mode. The bq2060A enters the
storage mode after a 5-s to 8-s delay. The bq2060A accepts other commands to Manufacturer Access() during
the delay before entering low-power storage mode. The LEDs must be off before entering the low-power storage
mode as the display state remains unchanged. During the delay following the low-power storage command, a
VFC Calibration command may be issued.
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