BK3231S Datasheet

V1.5

© 2015 Beken Corporation

Proprietary and Confidential

Page 20 of 24

In slave mode, the data on MOSI are sampled at the middle of period of every bit.

In master mode, the data on MISO are sampled at the last clock period to

acquire the maximal setup time.

3.8 PWM Timer

There are three timers, two of which is 16 bit and can be works as PWM waveform

generator, while the other one is 20bit timer. The PWM waveform can be output to GPIO

to drive external device such as LED.

3.9 Watch dog

The watch dog is used to reset the whole chip when the firmware runs out of order.

4 Electrical Specifications

4.1 General Specification

Table 4 General Characteristics

Name

Parameter (Condition)

Min

Typi

cal

Max

Unit

Com

ment

Operating Condition

VCC

Voltage

1.8

3.0

3.6

V

TEMP

Temperature

-20

+27

+80

ºC

Digital input Pin

VIH

High level

VCC-0.3

VCC+0.3

V

VIL

Low level

VSS

VSS+0.3

V

Digital output Pin

VOH

High level (IOH=-0.25mA)

VCC- 0.3

VCC

V

VOL

Low level(IOL=0.25mA)

VSS

VSS+0.3

V

4.2 BLE mode

Table 5 BLE mode RF Characteristics

Name

Parameter (Condition)

Min

Typi

cal

Max

Unit

Com

ment

Normal condition

IVDD

Deep sleep

TBD

uA

IVDD

Active RX

TBD

mA

IVDD

Active TX @ 2 dBm output power

TBD

mA

Transmitter

PRF

Output power

4

5

dBm

PBW

Modulation 20 dB bandwidth

1

MHz

Receiver

Max Input

1 E-3 BER

0

dBm

RXSENS

1 E-3 BER sensitivity

-89

dBm

IIP3

IIP3, Pin=-63 dBm; Punwant=-39

dBm; f0=2f1-f2, f2-f1=3 MHz or 4

MHz or 5 MHz

TBD

dBm