TSC2013-Q1 Datasheet, PDF (45/70 Pages) Texas Instruments – TSC2013-Q1 12-Bit, Nanopower, 4-Wire Dual-Touch Screen Controller With I2C Interface

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TSC2013-Q1
SLVSC89A – JUNE 2014 – REVISED JULY 2014
7.6.1.2 Configuration Register 1 (address = Dh) [reset = 0000h]
Configuration register 1 (CFR1) defines the connection test-bit modes configuration and batch-delay selection.
Figure 39. Configuration Register 1
D15
D14
D7
D6
Bit
D15-D3
D2-D0
Field
RESERVED
BTD[2:0]
D13
D12
D11
D10
D9
D8
RESERVED
W-0
D5
D4
D3
D2
D1
D0
RESERVED
BTD[2:0]
W-0
R/W-0
Table 11. Configuration Register 1 Field Descriptions
Type
W
R/W
Reset
0
0
Description
Batch time-delay mode
These are the selection bits that specify the delay before the triggering of a
sample or conversion scan cycle. When it is set, Batch time-delay mode uses a
set of timers to trigger a sequence of sample-and-conversion events
automatically. The mode works for both TSC-initiated scans (XYZ or XY) and
host-initiated scans (XYZ or XY).
Configure a TSC-initiated scan (XYZ or XY) by setting the PSM bit in CFR0 to 1
and C[3:0] in control byte 1 to 0000 or 0001. In the case of a TSC-initiated scan
(XYZ or XY), the sequence begins with the TSC responding to a pen touch.
After the first processed sample set completes during the batch delay, the scan
enters a wait mode until the end of the batch delay. If detection of a pen touch
persists at that moment, the scan continues to process the next sample set,
along with a resumption of the batch delay. The selected batch delay during the
time of the detected pen touch regulates the throughput of the processed
sample sets (shown in as sample sets per second, or SSPS). One can
configure a TSC-initiated scan (XYZ or XY) by setting the PSM bit in CFR0 to 1
and C[3:0] in control byte 1 to 0000 or 0001. Note that the throughput of the
processed sample set also depends on the settings of stabilization, precharge,
and sense times, and the total number of samples to be processed per
coordinates. If the accrual time of these factors exceeds the batch delay time,
the accrual time dominates. Batch delay time starts when the pen touch initiates
the scan function that converts coordinates.
One can configure a host-initiated scan (XYZ or XY) by setting the PSM bit in
CFR0 to 0 and C[3:0] in control byte 1 to 0000 or 0001. For the host-initiated
scan (XYZ or XY), the host must set TSC internal register C[3:0] in control byte
1 to 0000 or 0001 initially after a pen-touch detection; see . After engagement of
the scan (XYZ or XY), the selected batch-delay timer regulates the throughput
of the processed sample sets, as long as the initial detected touch is
uninterrupted.
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