Toshiba H1 Series Data Book page 567

3.20 Touch Screen Interface (TSI)
The TMP92CZ26A has an interface for 4-terminal resistor network touch-screen.
This interface supports two procedures: an X/Y position measurement and touch detection.
Each procedure is performed by setting the TSI control register (TSICR0 and TSICR1) and
using an internal AD converter.
3.20.1 Touch-Screen Interface Module Internal/External Connection
Touch
X+
Screen
AVCC
AVSS
P97
(PY)
P96/INT4
(PX)
PG3/AN3
(MY)
PG2/AN2
(MX)
VREFH
VREFL
Y-
X-
Y+
External Capacitors
Figure 3.20.1External connection of TSI
SPY
PXD (typ.50kΩ)
SMX
Figure 3.20.2 Internal block diagram of TSI
92CZ26A-564
TMP92CZ26A
MY
MX
PY
PX
Dec.
SPX
SMY
TMP92CZ26A
Touch screen control
PXEN
PYEN
MXEN
INT4
PTST
MYEN
INT4
TSI7
AD converter
AN3
AN2
AVCC
AVSS
VREFH
VREFL