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MC33975EK Datenblatt(PDF) 4 Page - Freescale Semiconductor, Inc

Teilenummer MC33975EK
Bauteilbeschribung  Multiple Switch Detection Interface with Suppressed Wake-up and 32mA Wetting Current
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Hersteller  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
4
Freescale Semiconductor
33975
PIN CONNECTIONS
PIN CONNECTIONS
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
Ground
Ground for logic, analog, and switch-to-battery inputs
2
SI
SPI Slave In
SPI control data input pin from MCU to 33975
3
SCLK
Serial Clock
SPI control clock input pin
4
CS
Chip Select
SPI control chip select input pin from MCU to 33975. Logic [0] allows data to be
transferred in
5–8
25–28
SPn
Programmable Switches 0–3
Programmable Switches 4–7
Programmable switch-to-battery or switch-to-ground input pins
9–15,
18–24
SGn
Switch-to-Ground Inputs 0–6
Switch-to-Ground Inputs 13–7
Switch-to-ground input pins
16
VPWR
Battery Input
Battery supply input pin. This pin requires external reverse battery protection.
17
WAKE
Wake-up
Open drain wake-up output is designed to control a power supply enable pin
29
INT
Interrupt
Open-drain output to MCU is used to indicate input switch change of state
30
AMUX
Analog Multiplex Output
Analog multiplex output
31
VDD
Voltage Drain Supply
3.3/5.0V supply sets SPI communication level for the SO driver
32
SO
SPI Slave Out
Provides digital data from 33975 to the MCU
SO
1
SP7
SP6
SP5
SP4
SG7
SG8
SG9
SG10
SG11
SG13
WAKE
SG12
INT
VDD
AMUX
GND
SP0
SP1
SP2
SP3
SG0
SG1
SG2
SG3
SG4
SG6
VPWR
SG5
CS
SI
SCLK
8
9
10
11
12
13
14
15
16
3
4
5
6
7
2
32
25
24
23
22
21
20
19
18
17
30
29
28
27
26
31


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