Datasheet

RESET
Device
State
Nor am l erai nOp t o Resetting InitialCondition
t 200n³
WL(RESET)
s
SDA
SCL
1
0 0
1 0 0
A0
R/W
0
0
1 0 1 1
0 X X
0
TSC2017
ACK
TSC2017
ACK
AddressByte SetupCommand
1
Software
ResetIssued
START
t
D(RESET)
200ns³
TSC2017
www.ti.com SBAS472 –DECEMBER 2009
RESET FUNCTION
The reset function is controlled by the SureSet™ control logic (SSC). There are three methods to reset the
device: hardware reset, software reset, and power-on reset (POR).
Hardware Reset
Hardware system reset can be performed using the RESET pin. After hardware reset, the device returns to the
default configuration and all the settings in the control byte are reset to the default values (see Table 2 and
Table 4). To ensure proper reset, the reset pulse width must have a duration of greater than 200ns. Note that a
pulse width of less than 200ns will have unexpected results. See Figure 35 for the external reset timing diagram.
Figure 35. External Reset Timing
Software Reset
The TSC2017 has a software reset that can be issued by loading the Setup comand with '1011 01xx' via I
2
C, as
shown in Figure 36. After software reset, the device returns to the default configuration and all the settings in the
control byte are reset to the default values (see Table 2 and Table 4).
Figure 36. Software Reset Timing
Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 31
Product Folder Link(s): TSC2017