MAX1233ETI+ Maxim Integrated Products, MAX1233ETI+ Datasheet - Page 36
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MAX1233ETI+
Manufacturer Part Number
MAX1233ETI+
Description
IC CNTRLR TOUCH 28-TQFN
Manufacturer
Maxim Integrated Products
Type
Resistiver
Datasheet
1.MAX1234ETIT.pdf
(44 pages)
Specifications of MAX1233ETI+
Touch Panel Interface
4-Wire
Number Of Inputs/keys
1, 4 x 4 Keypad
Resolution (bits)
8, 10, 12 b
Data Interface
MICROWIRE™, QSPI™, Serial, SPI™
Data Rate/sampling Rate (sps, Bps)
50k
Voltage Reference
External, Internal
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TQFN Exposed Pad
Applications
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
Figure 21. Touch-Initiated X- and Y- Coordinate Screen Scan
36
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YES
NO
NO
CONVERT X- COORDINATES
TURN ON DRIVERS: Y+, Y-
STORE X- COORDINATES
IS TOUCH-SCREEN
AVERAGING DONE?
SETTLING DONE?
POWER UP ADC
IN X- REGISTER
UNREAD SCAN
SET BUSY LOW
START CLOCK
PENIRQ LOW
ARE THERE
IS PENSTS
RESULTS?
SCREEN
BIT = 1?
IS DATA
TOUCH
SET
NO
YES
YES
YES
NO
X- AND Y- SCREEN SCAN
PENIRQ-INITIATED
HOST-INITIATED
(FIGURE 23)
GO TO
SCAN
NO
NO
CONVERT Y- COORDINATES
STORE Y- COORDINATES IN
TURN ON DRIVERS: X+. X-
RESET PENIRQ HIGH
AVERAGING DONE?
POWER DOWN ADC
IS TOUCH-SCREEN
SETTLING DONE?
TURN OFF CLOCK
POWER UP ADC
SET BUSY HIGH
POWER DOWN
Y- REGISTER
IS DATA
DONE
ADC
YES
YES