33993 Datasheet, PDF (3/28 Pages) Freescale Semiconductor, Inc – Multiple Switch Detection Interface

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. 33993 Pin Connections
Table 1. 33993 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 9.
Pin Number Pin Name
Formal Name
Definition
1
2
3
4
5–8
25 – 28
9 – 15,
18 – 24
16
17
29
30
31
32
GND
SI
SCLK
CS
SP0 – 3
SP4 – 7
SG0 – 6,
SG13 – 7
V_PWR
WAKE
INT
AMUX
V_DD
SO
Ground
SPI Slave In
Serial Clock
Chip Select
Programmable Switches
0–7
Switch-to-Ground Inputs
0 – 13
Battery Input
Ground for logic, analog, and switch to battery inputs.
SPI control data input pin from MCU to the 33993.
SPI control clock input pin.
SPI control chip select input pin from MCU to the 33993. Logic 0 allows data to be
transferred in.
Programmable switch-to-battery or switch-to-ground input pins.
Switch-to-ground input pins.
Battery supply input pin. Pin requires external reverse battery protection.
Wake-Up
Open drain wake-up output. Designed to control a power supply enable pin.
Interrupt
Open-drain output to the MCU. Used to indicate an input switch change of state.
Analog Multiplex Output Analog multiplex output.
Voltage Drain Supply 3.3/5.0 V supply. Sets SPI communication level for the SO driver.
SPI Slave Out
Provides digital data from 33993 to the MCU.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33993
3