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BQ76942EVM Circuit Module Physical Construction
Multi-function Pins for External Communication
--------------------------------------------------------------
CFETOFF / SPI_CS
HDQ / SPI_MOSI
SDA / SPI_MISO
SCL / SPI_SCLK
Pull-up /
ALERT / HDQ
pull-down
selection
REG1
J8
TP20
R25
10k
1
2
CFETOFF
3
100k R26
REG1
J9
TP21
R27
VSS
10k
1
2
HDQ
REG1
J11
TP22
R28
10k
1
2
SDA
REG1
J14
TP23
R29
10k
1
2
SCL
REG1
J16
TP24
R31
10k
1
2
ALERT
40
BQ76942 Evaluation Module
uController
interface type
selection
J7
1
uC_SPI_CS
2
EXT_SPI_CS
1
uC_SPI_MOSI
2
3
uC_HDQ
EXT_SPI_MOSI_HDQ
J10
1
uC_SPI_MISO_A
2
3
uC_SDA
EXT_SPIMISO_SDA
J12
1
uC_SPI_CLK
2
3
uC_SCL
J15
EXT_SPICLK_SCL
1
uC_HDQ
J17
2
U2
U3
Figure 5-10. Schematic Diagram Pin Configuration
Copyright © 2020 Texas Instruments Incorporated
External I2C Connection
4
3
2
1
PGND
External SPI Connections / HDQ
5
4
3
2
1
E1
E2
E3
E4
U4
U5
PGND
J13
SDA
SCL
PACK-
SPI_MOSI / HDQ
SPI_MISO
SPI_CLK
SPI_CS
PACK-
J18
Cell Simulator - Populate
shunts to use cell simulator
if not connecting a battery.
J19
1
10P
3
9P
5
8P
7
7P
9
6P
11
5P
13
4P
15
3P
17
2P
19
1P
PEC10DAAN
SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020
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www.ti.com
R30
200
R32
200
R33
200
R34
200
R35
200
R36
200
2
R37
200
4
6
8
10
12
R38
200
14
16
18
20
R39
200
R40
200
BAT-
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