MC33884DW Freescale Semiconductor, MC33884DW Datasheet - Page 15

• Manufacturer Part Number: MC33884DW
• Description: IC SWITCH SDI MONITOR 24-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33884DW

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 24-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TRI-STATE COMMAND
condition, essentially disconnecting the wetting current (if the
switch is metallic) and the sustain current. The internal input-
threshold comparator is still internally connected to its
external pin. This command does not change the mode of
operation
CP[4:1] – CONFIGURE PROGRAMMABLE SWITCH
either an external switch-to-ground (internal current source)
or an external switch-to-battery (internal current sink).
Table 12. Tri-State Command
Table 13. Programmable Switch Bit Definition
Table 14. Metallic Command
Table 15. Metallic Switch Bit Definition
Analog Integrated Circuit Device Data
Freescale Semiconductor
Command
Tri-State
Reset Values:
Run Register
TG[6:1] = Tri-state switch-to-ground
TB[2:1] = Tri-state switch-to-battery
TP[4:1] = Tri-state programmable switch
Command
Metallic
Reset Values:
Run Register
U = Unknown value coming out of Sleep mode. It must be configured with Run command.
MG[6:1] = Metallic switch-to-ground
MB[2:1] = Metallic switch-to-battery
MP[4:1] = Metallic programmable switch
0
1
0
1
MGx, MBx, MPx
This command places an external switch into a Tri-State
Configure the programmable inputs SP[4:1] to detect
TGx, TBx, TPx
MSB
MSB
16
16
—
—
0
0
Metallic (Enable Wetting Current Pulse)
15
15
—
—
0
1
Input Disabled (Default)
14
14
—
—
0
1
Input Configured to:
Accept Switch Type:
Input Enabled
Non-Metallic
13
13
—
—
1
1
MG6
TG6
12
12
U
0
MG5
TG5
11
11
U
0
MG4
TG4
10
10
U
0
MG3
TG3
U
9
9
0
valid Operating Modes (see MOD[2:1]) within the Run
command.
Table 11. Programmable Switch Bit Definition
mode leaves the part in that mode).
inputs in Tri-State) in response to a hardware reset; all inputs
also remain in Tri-State after existing the Sleep mode.
METALLIC COMMAND
external metallic switch and disables it for an external non-
metallic switch. This command does not change the mode of
operation (e.g., a Metallic command received while in Polling
mode leaves the part in that mode). Note that the Run
register values are unknown after exiting the Sleep mode.
0
1
MG2
Note: This configuration may be entered in any of the three
(e.g., a Tri-State command received while in the Polling
Note: The Tri-State register clears all bits to logic [0] (all
This command enables the pulsed wetting current for an
TG2
CPx
U
8
8
0
MG1
TG1
U
7
7
0
MP4
TP4
U
6
6
0
LOGIC COMMANDS AND REGISTERS
MP3
TP3
U
5
FUNCTIONAL DEVICE OPERATION
External Switch to:
5
0
Ground
MP2
Battery
TP2
U
4
4
0
MP1
TP1
U
3
3
0
MB2
TB2
U
2
2
0
MB1
LSB
LSB
TB1
33884
U
1
1
0
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