MC33972EW/R2 FREESCALE [Freescale Semiconductor, Inc], MC33972EW/R2 Datasheet - Page 18

• Manufacturer Part Number: MC33972EW/R2
• Description: Multiple Switch Detection Interface with Suppressed Wake-up
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

RESET
Reset (POR) state. Refer to
Table 14. Reset Command
SPI COMMAND SUMMARY
commands recognized by the 33972 and the reset state of
each register.
Table 15. SPI Command Summary
18
Switch Status
Command
Settings Command
Bat = 1, Gnd = 0
(Default state = 1)
Wake-Up/Interrupt Bit
Wake-Up = 1
Non-Wake-Up = 0
(Default state = 1)
Metallic Command
Metallic = 1
Non-metallic = 0
(Default state = 1)
Analog Command
Wetting Current Timer
Enable Command
Timer ON = 1
Timer OFF = 0
(Default state = 1)
Tri-State Command
Input Tri-State = 1
Input Active = 0
(Default state = 1)
Calibration Command
(Default state –
Sleep Command
(Refer to
on page
Reset Command
SO Response Will
Always Send
33972
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
uncalibrated)
23
0
The reset command resets all registers to Power-ON
Table 15
19.)
Sleep Mode
22
1
21
below provides a comprehensive list of SPI
1
Reset Command
Table 16
MSB
them
20
23
flg
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22
int
flg
0
0
0
0
0
0
0
0
0
0
0
0
0
1
19
1
and
SP7
21
0
0
0
0
0
0
0
0
0
0
0
0
0
1
18
Table 17
Table
1
Command Bits
SP6
20
0
0
0
0
0
0
0
0
0
0
0
0
0
1
17
1
15, page 18, for POR
SP5
19
0
0
0
0
0
0
0
0
1
1
1
1
1
1
contain the serial
16
1
SP4
18
0
0
0
0
1
1
1
1
0
0
0
0
1
1
15
X
SP3
17
0
0
1
1
0
0
1
1
0
0
1
1
0
1
SP2
14
X
16
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SP1
15
13
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SP0 SG13 SG12 SG11 SG10 SG9
14
X
X
X
X
X
X
X
X
X
X
X
X
X
X
12
X
SG13 SG12 SG11 SG10 SG9
SG13 SG12 SG11 SG10 SG9
SG13 SG12 SG11 SG10 SG9
SG13 SG12 SG11 SG10 SG9
13
X
X
X
X
X
X
X
X
X
X
11
X
states or the paragraph entitled
page
output (SO) data for input voltages greater or less than the
threshold level. Open switches are always indicated with a
logic [0], closed switches are indicated with logic [1].
12
X
X
X
X
X
X
X
X
X
X
10
X
14
11
X
X
X
X
X
X
X
X
X
X
of this datasheet.
X
9
10
X
X
X
X
X
X
X
X
X
X
Command Bits
X
Setting Bits
8
9
X
X
X
X
X
X
X
X
X
X
SG8
SG8
SG8
SG8
SG8
X
X
X
X
X
X
X
X
X
X
X
7
8
Analog Integrated Circuit Device Data
SP7
SP7
SG7
SP7
SG7
SP7
SG7
SP7
SG7
SG7
X
X
X
X
X
7
6
X
16mA
SG6
SG6
SG6
SG6
SG6
SP6
SP6
SP6
SP6
SP6
6
X
0
X
X
X
5
X
Power-ON Reset (POR)
2.0mA
timer
SG5
SG5
SG5
SG5
SG5
SP5
SP5
SP5
SP5
SP5
int
5
X
0
X
X
Freescale Semiconductor
4
X
timer
SG4
SG4
SG4
SG4
SG4
SP4
SP4
SP4
SP4
SP4
int
4
X
0
X
X
3
X
timer
SG3
SG3
SG3
SG3
SG3
SP3
SP3
SP3
SP3
SP3
int
X
X
X
3
0
2
X
scan
timer
SP2
SP2
SG2
SP2
SG2
SP2
SG2
SP2
SG2
SG2
X
X
X
2
0
timer
1
X
SG1
SG1
SG1
SG1
scan
SG1
SP1
SP1
SP1
SP1
SP1
X
X
X
1
0
LSBI
timer
SG0
SG0
SG0
SG0
scan
SG0
on
SP0
SP0
SP0
SP0
SP0
0
X
0
X
0
X
X