Datasheet

TSC2007
www.ti.com ...................................................................................................................................................... SBAS405A – MARCH 2007 – REVISED MARCH 2009
When the TSC2007 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 REFERENCE
C3 C2 C1 C0 FUNCTION CONVERTER X-DRIVERS Y-DRIVERS ACK MODE
0 0 0 0 Measure TEMP0 TEMP0 OFF OFF Y Single-Ended
0 0 0 1 Reserved N/A OFF OFF N Single-Ended
0 0 1 0 Measure AUX AUX OFF OFF Y Single-Ended
0 0 1 1 Reserved N/A OFF OFF N Single-Ended
0 1 0 0 Measure TEMP1 TEMP1 OFF OFF Y Single-Ended
0 1 0 1 Reserved N/A OFF OFF N Single-Ended
0 1 1 0 Reserved N/A OFF OFF N Single-Ended
0 1 1 1 Reserved N/A OFF OFF N Single-Ended
1 0 0 0 Activate X-drivers N/A ON OFF Y Differential
1 0 0 1 Activate Y-drivers N/A OFF ON Y Differential
1 0 1 0 Activate Y+, X-drivers N/A X – ON Y+ ON Y Differential
1 0 1 1 Setup command
(1)
N/A OFF OFF N N/A
1 1 0 0 Measure X position Y+ ON OFF Y Differential
1 1 0 1 Measure Y position X+ OFF ON Y Differential
1 1 1 0 Measure Z1 position X+ X – ON Y+ ON Y Differential
1 1 1 1 Measure Z2 position Y – X – ON Y+ ON Y Differential
(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 C3-C0 = '1011' Setup command; must write '1011'.
D3-D2 PD1-PD0 = '00' Reserved; must write '00'.
0: Use the onboard MAV filter (default).
D1 Filter control
1: Bypass the onboard MAV filter.
0: R
IRQ
= 50k Ω (default).
D0 PENIRQ pull-up resistor (R
IRQ
) select
1: R
IRQ
= 90k Ω .
Copyright © 2007 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 25
Product Folder Link(s): TSC2007