MC33975ATEKR2 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC33975ATEKR2

Multiple Switch Detection Interface with Suppressed Wake-up and 32 mA Wetting Current

Freescale Semiconductor 

PIN CONNECTIONS

PIN CONNECTIONS

GND

1

SI

2

SCLK

3

CS

4

SP0

5

SP1

6

SP2

7

SP3

8

SG0

9

SG1

10

SG2

11

SG3

12

SG4

13

SG5

14

SG6

15

VPWR

16

32

SO

31

VDD

30

AMUX

29

INT

28

SP7

27

SP6

26

SP5

25

SP4

24

SG7

23

SG8

22

SG9

21

SG10

20

SG11

19

SG12

18

SG13

17

WAKE

Figure 3. 33975 Pin Connections

Table 2. Pin Definitions

A functional description of each Pin can be found in the Functional Pin Description section on page 12.

Pin

Pin Name

Formal Name

Description

1

GND

2

SI

3

SCLK

4

CS

Ground

SPI Slave In

Serial Clock

Chip Select

Ground for logic, analog, and switch-to-battery inputs

SPI control data input pin from MCU to 33975

SPI control clock input pin

SPI control chip select input pin from MCU to 33975. Logic [0] allows data to be

transferred in

5–8

25 – 28

9 – 15,

18 – 24

16

17

29

30

31

32

SPn

SGn

VPWR

WAKE

INT

AMUX

VDD

SO

Programmable Switches 0–3

Programmable Switches 4–7

Switch-to-Ground Inputs 0–6

Switch-to-Ground Inputs 13–7

Battery Input

Wake-up

Interrupt

Analog Multiplex Output

Voltage Drain Supply

SPI Slave Out

Programmable switch-to-battery or switch-to-ground input pins

Switch-to-ground input pins

Battery supply input pin. This pin requires external reverse battery protection.

Open drain wake-up output is designed to control a power supply enable pin

Open-drain output to MCU is used to indicate input switch change of state

Analog multiplex output

3.3/5.0 V supply sets SPI communication level for the SO driver

Provides digital data from 33975 to the MCU

33975

4

Analog Integrated Circuit Device Data

Freescale Semiconductor

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