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MAX1233ETI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
______________________________________________________________________________________ 37
YES
SCREEN
TOUCH
START CLOCK
GO TO
HOST-INITIATED
SCAN
(FIGURE 24)
NO
YES
POWER UP ADC
YES
SET
PENIRQ LOW
ARE THERE
UNREAD SCAN
RESULTS?
NO
CONVERT X- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
NO
IS DATA
AVERAGING DONE?
TURN ON DRIVERS: X+, X-
YES
NO
POWER UP ADC
CONVERT Y- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
YES
NO
STORE Y- COORDINATES IN
Y- REGISTER
POWER DOWN ADC
IS DATA
AVERAGING DONE?
CONVERT Z
1
- COORDINATES
YES
NO
IS DATA
AVERAGING DONE?
IS PENSTS
BIT = 1?
SET BUSY LOW
TURN ON DRIVERS: Y+, Y-
DONE
TURN OFF CLOCK
SET BUSY HIGH
STORE Z
1
- COORDINATES
IN Z
1
- REGISTER
YES
NO
IS DATA
AVERAGING DONE?
CONVERT Z
2
COORDINATES
STORE Z
2
- COORDINATES
IN Z
2
- REGISTER
RESET PENIRQ HIGH
PENIRQ-INITIATED
X, Y, AND Z SCREEN SCAN
POWER UP ADC
STORE X- COORDINATES
IN X- REGISTER
POWER DOWN ADC
TURN ON DRIVERS: Y+, X-
YES
NO
POWER UP ADC
IS TOUCH-SCREEN
SETTLING DONE?
Figure 22. Touch-Initiated X- , Y-, and Z- Coordinate Screen Scan
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
38 ______________________________________________________________________________________
YES
SCREEN
TOUCH
START CLOCK
HOST WRITES
ADC CONTROL REGISTER
(PENSTS = ADSTS = 0)
NO
NO
YES
POWER UP ADC
YES
SET
PENIRQ LOW
ARE THERE
UNREAD SCAN
RESULTS?
NO
CONVERT X- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
NO
IS DATA
AVERAGING DONE?
STORE X- COORDINATES
IN X- REGISTER
YES
NO
POWER DOWN ADC
POWER UP ADC
TURN ON DRIVERS: X+, X-
CONVERT Y- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
YES
NO
IS DATA
AVERAGING DONE?
IS PENSTS
BIT = 1?
SET BUSY LOW
TURN ON DRIVERS: Y+, Y-
DONE
TURN OFF CLOCK
SET BUSY HIGH
STORE Y- COORDINATES IN
Y- REGISTER
RESET PENIRQ HIGH
HOST-INITIATED
X- AND Y- SCREEN SCAN
POWER DOWN ADC
GO TO
TOUCH-INITIATED
SCAN
(FIGURE 21)
YES
Figure 23. Host-Initiated X- and Y- Coordinate Screen Scan
MAX1233/MAX1234
±15kV ESD-Protected Touch-Screen
Controllers Include DAC and Keypad Controller
______________________________________________________________________________________ 39
YES
SCREEN
TOUCH
START CLOCK
HOST WRITES
ADC
CONTROL REGISTER
NO
NO
POWER UP ADC
YES
SET
PENIRQ LOW
ARE THERE
UNREAD SCAN
RESULTS?
NO
CONVERT X- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
YES
NO
STORE X- COORDINATES
IN X- REGISTER
POWER DOWN ADC
IS DATA
AVERAGING DONE?
TURN ON DRIVERS: Y+, X-
TURN ON DRIVERS: X+, X-
YES
NO
POWER UP ADC
CONVERT Y- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
YES
NO
STORE Y- COORDINATES IN
Y- REGISTER
POWER DOWN ADC
IS DATA
AVERAGING DONE?
YES
NO
POWER UP ADC
CONVERT Z
1
- COORDINATES
IS TOUCH-SCREEN
SETTLING DONE?
YES
NO
IS DATA
AVERAGING DONE?
IS PENSTS
BIT = 1?
SET BUSY LOW
TURN ON DRIVERS: Y+, Y-
DONE
TURN OFF CLOCK
SET BUSY HIGH
STORE Z
1
- COORDINATES
IN Z
1
- REGISTER
YES
NO
IS DATA
AVERAGING DONE?
CONVERT Z
2
-
COORDINATES
STORE Z
2
- COORDINATES
IIN Z
2
- REGISTER
RESET PENIRQ HIGH
HOST-INITIATED
X-, Y-, AND Z- SCREEN SCAN
POWER DOWN ADC
GO TO
TOUCH-INITIATED
SCAN
(FIGURE 22)
YES
Figure 24. Host-Initiated X-, Y-, and Z- Coordinate Screen Scan
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44

MAX1233ETI+T

Mfr. #:
Buy MAX1233ETI+T
Manufacturer:
Maxim Integrated
Description:
Touch Screen Controllers 4Ch uWire QSPI/SPI Touch Interface
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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