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bq2085-V1P3
SLUS598 − FEBRUARY 2004
Terminal Functions
TERMINAL
NAME
CLKOUT
DISP
FILT
EVENT
LED1
LED2
LED3
LED4
LED5
MRST
N/C
OC
RBI
ROSC
SAFE
SCLK
SDATA
SMBC
SMBD
SR1
SR2
TS
VDDA
VDDD
VIN
VSSA
VSSD
VSSA
No.
35
17
32
18
24
23
22
21
20
26
4, 5, 7, 13,
14, 25, 36, 37
3
9
33
12
6
10
15
16
28
27
2
31
8
1
30, 34
11, 19, 38
29
I/O
I
I
I
I
O
O
O
O
O
I
−
I
I
I
O
O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
I
Connections for a small-value sense resistor to monitor the battery charge- and discharge-current flow
Thermistor voltage input connection to monitor temperature
Positive supply for analog circuitry
Positive supply for digital circuitry and I/O pins
Single-cell voltage input from the bq29311
Negative supply for analog circuitry
Negative supply for digital circuitry
Negative supply for output circuitry
Master reset input that forces the device into reset when held high
No connection
Analog input for auto ADC offset compensation; should be connected to VSSA
Register backup that provides backup potential to the bq2085−V1P3 data registers during periods of low
operating voltage. RBI accepts a storage capacitor or a battery input.
Internal time base bias input
Output for additional level of safety protection; e.g., fuse blow.
Communication clock to the bq29311
Data transfer to and from bq29311
SMBus clock open-drain bidirectional pin used to clock the data transfer to and from the bq2085−V1P3
SMBus data open-drain bidirectional pin used to transfer address and data to and from the bq2085−V1P3
LED display segments that each may drive an external LED
32.768-kHz output to the bq29311
Display control for the LED drivers LED1 through LED5
Analog input connected to the external PLL filter
Input from bq29311 XALERT output
DESCRIPTION
3
TI [ TEXAS INSTRUMENTS ]
