bq500110

SLUSAE0A

– NOVEMBER 2010 – REVISED APRIL 2011

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PIN FUNCTIONS (continued)

PIN

I/O

DESCRIPTION

NO.

NAME

17

LED1 / SCLK

O

LED Drive Output 1 / Serial Clock Output

18

DIAG_DIS

I/O

Disable Diagnostic Output. Leave this pin floating to inhibit diagnostic.

19

PMB_ALERT

I/O

Optional Programming I/O. Connect to GND.

20

PMB_CTRL

I/O

21

SCI-TX

I/O

Optional Programming I/O. Leave floating.

22

SCI-RX

I/O

Optional Programming I/O. Leave floating.

23

WDO

O

External Watchdog Output

24

BUZ_AC

O

AC Buzzer Output

25

MOSI

I/O

Master Out Slave In

26

LED3/MISO/NO_SUP

I/O

LED Drive Output 3 / Master In Slave Out / Select stand alone operation (no supervisor)

27

TCK

I/O

Optional Programming I/O. Leave floating.

28

TDO

I/O

Optional Programming I/O. Leave floating.

29

TDI

I/O

30

TMS

I/O

31

TRST

I/O

Optional programming I/O. Pull to GND via 10k

Ω resistor.

32

DGND

—

Digital GND

33

V33D

—

Digital Core 3.3V Supply

34

V33A

—

Analog 3.3V Supply

35

BPCAP

—

1.8V Bypass Capacitor Connect Pin

36

AGND

—

Analog GND

37

AN1

I

Reserved Analog Input. Connect this pin to GND.

38

AN2

I

Reserved Analog Input. Connect this pin to GND.

39

AN3

I

Reserved Analog Input. Connect this pin to GND.

40

AN4

I

Reserved Analog Input. Connect this pin to GND.

41

V33FB

I

3.3V Linear-Regulator Feedback Input. Leave this pin floating.

42

I_COIL

I

Coil Current Input

43

PMOD_THR

I

Input to Program Parasitic Metal Object Detection Threshold

44

LED_MODE

I

Input to Select LED Mode

45

AIN7

I

Reserved Analog Input. Connect this pin to GND.

46

I_IN

I

Transmitter Input Current

47

AGN2

—

Analog GND 2.

48

EXTREF

I

External Reference Voltage Input. Connect this Input to GND.

6

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