Information

48.5 TSI signal descriptions
The TSI module has up to 16 external pins for touch sensing. The table below itemizes all
the TSI external pins.
Table 48-2. TSI signal descriptions
Signal Description I/O
TSI_IN[15:0] TSI capacitive pins. Switchable driver that connects directly to the
electrode pins TSI[15:0] can operate as GPIO pins
I/O
48.5.1 TSI_IN[15:0]
When TSI functionality is enabled by the PEN[PENn], the TSI analog portion uses
corresponding TSI_IN[n] pin to connect the module with the external electrode. The
connection between the pin and the touch pad must be kept as short as possible to reduce
distribution capacity on board.
48.6 Memory map and register definition
This section presents the touch sensing input module memory map and registers
definition.
TSI memory map
Absolute
address
(hex)
Register name
Width
(in bits)
Access Reset value
Section/
page
4004_5000 General Control and Status Register (TSI0_GENCS) 32 R/W 0000_0000h
48.6.1/
1195
4004_5004 SCAN Control Register (TSI0_SCANC) 32 R/W 0000_0000h
48.6.2/
1198
4004_5008 Pin Enable Register (TSI0_PEN) 32 R/W 0000_0000h
48.6.3/
1200
4004_500C Wake-Up Channel Counter Register (TSI0_WUCNTR) 32 R/W 0000_0000h
48.6.4/
1202
4004_5100 Counter Register (TSI0_CNTR1) 32 R 0000_0000h
48.6.5/
1203
Table continues on the next page...
Chapter 48 Touch sense input (TSI)
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 1193