33884 Datasheet, PDF (3/21 Pages) Freescale Semiconductor, Inc – Switch Monitor Interface

PIN CONNECTIONS
PIN CONNECTIONS
VDD
1
SO
2
SI
3
SP1
4
SG1
5
SG2
6
SG3
7
SB1
8
SP2
9
MASL
10
VPWR
11
VSS
12
24 _SCLK
23 _CS
22 _VBG
21 _SP4
20 _SG6
19 _SG5
18 _SG4
17 _SB2
16 _SP3
15 _INT
14 _SYNC
13 _RST
Figure 3. 33884 Pin Connections
Table 1. 33884 Pin Definitions
Pin Number Pin Name
Formal Name
Definitions
1
VDD
Voltage Power
This pin is 5.0 V logic supply.
2
SO
Serial Output
This pin is the SPI data out.
3
SI
Serial Input
This pin provides data input.
4
SP1
Switch Input One
This pin senses inputs programmed to read switch-to-ground (battery) supply contacts.
5
SG1 Switch-to-Ground Inputs This pin is one of six and are switch-to-ground inputs only.
One
6
SG2 Switch-to-Ground Inputs ^{This pin is one of six and are switch-to-ground inputs only.}
Two
7
SG3 Switch-to-Ground Inputs ^{This pin is one of six and are switch-to-ground inputs only.}
Three
8
SB1
Switch-to Battery One This pin is one of two, and senses inputs only.
9
SP2
Switch Input Two
This pin senses inputs programmed to read switch-to-ground (battery) supply contacts.
10
MASL
Master/Slave
This pin identifies which device will be master and which will be slave.
11
VPWR
Voltage Power
This pin is the power source.
12
VSS
Voltage SS
This pin is a ground.
13
RST
Reset
This pin is active low reset input to the device.
14
SYNC
Synchronization
This pin is used by the slave IC during the Polling mode.
15
INT
Interrupt
This pin is an interrupt output from the device.
16
SP3
Switch Input Three ^{This pin senses inputs programmed to read switch-to-ground (battery) supply contacts.}
17
SB2
Switch-to-Battery Two This pin is one of two, and senses inputs only.
18
SG4 Switch-to-Ground Inputs ^{This pin is one of six and are switch-to-ground inputs only.}
Four
19
SG5 Switch-to-Ground Inputs This pin is one of six and are switch-to-ground inputs only.
Five
20
SG6 Switch-to-Ground Inputs ^{This pin is one of six and are switch-to-ground inputs only.}
Four
21
SP4
Switch Input One
This pin senses inputs programmed to read switch-to-ground (battery) supply contacts.
22
VBG
Bandgap Voltage
This pin....
Analog Integrated Circuit Device Data
Freescale Semiconductor
33884
3