BK3231

v0.1

© 2011Beken Corporation

Proprietary and Confidential

Page 8 of 12

4 PIN information

The next diagram shows QFN56 format for the full functions usage.It can be used as

keyboard TX part and total 35 GPIO available.

1

7

6

5

4

3

2

8

35

41

40

39

38

37

36

42

BK3231

QFN

7mmx7mm 56-Pin

P44

VCCDIG

XTALN

P11

P04

P47

MBISTEN

PPROG

PRSTN

P03

P41

P02

P10

P14

P36

P37

14

14

13

12

11

XTALP

VCCXTAL

NC

VDDPA

RFP

VCCRF

33

32

31

30

34

P27

VDDDSP

VCCDIG

VDDSPI

10

9

29

TDI

TMS

Figure 2BK3231QFN56Pin Assignment

Table1BK3231 QFN56 pin description

PIN

Name

Pin Function

Description

1

P44

Digital I/O

General I/O

2

VCCDIG

Power supply

3 V supply

3

PPROG

Digital I/O

FLASH programming selection

4

MBISTEN

Digital I/O

Test enable

5

P47

Digital I/O

General I/O

6

P04

Digital I/O

General I/O, or MOSI for SPI

7

P11

Digital I/O

General I/O, or input for external active low

interrupt

8

XTALN

Analog output

Oscillator output

9

XTALP

Analog input

Oscillator input

10

VCCXTAL

Power supply

3 V supply

11

VCCRF

Power supply

3 V supply