TSC2014IYZGR datasheet(46/62 Pages) TI2

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TSC2014

SBAS484B – SEPTEMBER 2010 – REVISED DECEMBER 2016

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A host-initiated scan (XYZ or XY) can be configured 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 is detected; see Conversion Controlled by TSC2014

Initiated by Host (TSMode 2) , in the Theory of Operation section. After the scan (XYZ or XY) is engaged, the

throughput of the processed sample sets is regulated by the selected batch delay timer, as long as the initial

detected touch is not interrupted.

Table 19. Touch Screen Throughput and Batch Selection Bits

BATCH DELAY SELECTION

DELAY TIME

(ms)

THROUGHPUT FOR TSC-INITIATED

OR HOST-INITIATED SCAN, XYZ OR XY

(SSPS)

BTD2

BTD1

BTD0

Normal operation throughput depends on settings.

1000

500

250

100

For example, if stabilization time, precharge time, and sense time are selected as 100μs, 84μs, and 96μs,

respectively, and the batch delay time is 2ms, then the scan function enters wait mode after the first processed

sample set until the 2ms of batch delay time is reached. When the scan function starts to process the second

sample set (if the screen is still touched), the batch delay restarts at 2ms (in this example). This procedure

remains regulated by 2ms until the pen touch is not detected or the scan function is stopped by a stop bit or any

reset form.

TSC2014IYZGR Datasheet(PDF) 46 Page - Texas Instruments