Datasheet > 33975

33975

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
32页	884K
描述
Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current

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33975 数据手册

TERMINAL CONNECTIONS

GND

SCLK

VDD

AMUX

INT

SP7

SP6

SP0

SP1

SP2

SP3

SG0

SG1

SG2

SG3

SG4

SG5

SG6

VPWR

SP5

SP4

SG7

SG8

SG9

SG10

SG11

SG12

SG13

WAKE

Figure 3. 33975 Terminal Connections

Table 2. Terminal Definitions

A functional description of each terminal can be found in the Functional Terminal Description section on page 11.

Terminal

Name

Terminal

Formal Name

Description

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

SPI control data input terminal from MCU to 33975.

SPI control clock input terminal.

GND

Ground

SPI Slave In

Serial Clock

Chip Select

SCLK

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

to be transferred in.

Programmable switch-to-battery or switch-to-ground input terminals.

5–8

25–28

SPn

SGn

Programmable Switches 0–3

Programmable Switches 4–7

Switch-to-ground input terminals.

9–15,

18–24

Switch-to-Ground Inputs 0–6

Switch-to-Ground Inputs 13–7

Battery supply input terminal. This terminal requires external reverse battery

protection.

VPWR

WAKE

Battery Input

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

terminal.

Wake-Up

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

Analog multiplex output.

INT

AMUX

VDD

Interrupt

Analog Multiplex Output

Voltage Drain Supply

SPI Slave Out

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

Provides digital data from 33975 to MCU.

33975

Analog Integrated Circuit Device Data

Freescale Semiconductor

1 2 345 6 7...32

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