MCZ33975EK Freescale Semiconductor, MCZ33975EK Datasheet - Page 18

• Manufacturer Part Number: MCZ33975EK
• Description: IC DETECTOR MULT SWITCH 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33975EK

• Applications: Automotive
• Interface: SPI
• Voltage - Supply: 5.5 V ~ 28 V
• Package / Case: 32-SOIC (7.5mm Width) Exposed Pad, 32-eSOIC, 32-HSOIC
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 10. Tri-State Command
Table 9. Wetting Current Timer Enable Command
TRI-STATE REGISTER
node as high-impedance (refer to
Tri-state Register bit to logic [1], the input will be high-
impedance regardless of the metallic command setting. The
ANALOG SELECT REGISTER
MCU using the analog command (refer to
to the IC is a 22-to-1 analog multiplexer. The voltage present
on the selected input pin is buffered and made available on
the AMUX output pin. The AMUX output pin is clamped to a
maximum of VDD volts regardless of the higher voltages
present on the input pin. After an input has been selected as
the analog, the corresponding bit in the next SO data stream
will be logic [0]. When selecting a channel to be read as
analog, the user must also set the desired current (32mA,
4.0mA, or high-impedance). Setting bit 6 and bit 5 to 0,0
selects the input as high-impedance. Setting bit 6 and bit 5 to
18
33975
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
23
23
0
0
23
0
0
0
The tri-state command is use to set the SPn or SGn input
The analog voltage on switch inputs may be read by the
Wetting Current Timer Commands
22
22
0
0
22
0
0
0
Tri-State Commands
21
0
0
21
21
0
0
Analog Command
0
20
0
0
20
20
0
0
0
19
1
1
19
19
0
1
0
18
0
0
18
18
1
0
1
17
0
1
17
17
1
0
1
Table
16
1
0
16
16
1
0
0
10). By setting the
Table
15
X
X
15
15
X
X
X
14
X
X
11). Internal
Table 11. Analog Command
14
14
X
X
X
sg13 sg12 sg11 sg10 sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
13
X
sg1
13
13
X
X
3
sg1
12
12
12
X
X
X
2
Not used
sg1
11
11
X
X
11
1
X
comparator on each input remains active. This command
allows the use of each input as a comparator with a 4.0V
threshold. The MCU may change or update the Tri-state
Register via software at any time in Normal Mode.
0,1 selects 4.0mA, and 1,0 selects 32mA. Setting bit 6 and
bit 5 to 1,1 in the Analog Select Register is not allowed and
will place the input as an analog input with high-impedance.
currents for all SGn and SPn inputs (refer to
analog command does not allow pull-down currents on the
SPn inputs. Setting the current to 32mA or 4.0mA may be
useful for reading sensor inputs. Further information is
provided in the
beginning on page 24. The MCU may change or update the
Analog Select Register via software at any time in Normal
Mode.
Analog currents set by the analog command are pull-up
sg1
10
10
X
X
0
10
X
sg9 sg8 sg7 sg6 sg5 sg4 sg3 sg2 sg1 sg0
X
9
X
9
Command Bits
Command Bits
X
9
X
8
X
8
Typical Applications
8
X
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
X
7
7
sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0
7
Analog Integrated Circuit Device Data
mA
32
Current
6
6
Select
6
4.0
mA
5
5
5
Freescale Semiconductor
section of this datasheet
4
0
4
Analog Channel Select
4
3
0
3
3
Table
2
0
2
2
11). The
1
0
1
1
0
0
0
0