TSC2007-Q1
SBAS545 –SEPTEMBER 2011
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When the TSC2007-Q1 powers up, the power-down bits must be written to ensure that the device is placed into
the mode that achieves the lowest power. Therefore, immediately after power-up, send a command byte that
sets PD1 = PD0 = 0, so that the device will be in the lowest power mode, powering down between conversions.
Table 3. Converter Function Select
INPUT TO
A/D
CONVERTER
REFERENCE
MODE
C3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
C2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
C1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
C0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
FUNCTION
Measure TEMP0
Reserved
X-DRIVERS
OFF
Y-DRIVERS
OFF
ACK
Y
TEMP0
N/A
AUX
N/A
TEMP1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Y+
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Single-Ended
Differential
Differential
Differential
N/A
OFF
OFF
N
Y
Measure AUX
OFF
OFF
Reserved
OFF
OFF
N
Y
Measure TEMP1
Reserved
OFF
OFF
OFF
OFF
N
N
N
Y
Reserved
OFF
OFF
Reserved
OFF
OFF
Activate X-drivers
Activate Y-drivers
Activate Y+, X-drivers
Setup command(1)
Measure X position
Measure Y position
Measure Z1 position
Measure Z2 position
ON
OFF
OFF
ON
Y
X– ON
OFF
Y+ ON
OFF
Y
N
Y
ON
OFF
Differential
Differential
Differential
Differential
X+
OFF
ON
Y
X+
X– ON
X– ON
Y+ ON
Y+ ON
Y
Y–
Y
(1) The setup command has an additional four bits of data. These data are static; that is, they are not changed by other commands, except
for the power-on reset. The default value for these bits after power-on reset is 0000. Table 4 shows the definition of these data bits.
Table 4. Command Byte Definition for the Setup Command
BIT
NAME
DESCRIPTION
D7-D4
D3-D2
C3-C0 = '1011'
PD1-PD0 = '00'
Setup command; must write '1011'.
Reserved; must write '00'.
0: Use the onboard MAV filter (default).
1: Bypass the onboard MAV filter.
D1
D0
Filter control
0: RIRQ = 50kΩ (default).
1: RIRQ = 90kΩ.
PENIRQ pull-up resistor (RIRQ) select
26
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