MAX1233ETI+ Maxim Integrated Products, MAX1233ETI+ Datasheet - Page 35
![IC CNTRLR TOUCH 28-TQFN](/photos/6/61/66150/28-tqfn_21-0139h_sml.jpg)
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
Figure 20. Scan Mode Flowchart
Controllers Include DAC and Keypad Controller
NO
NO
______________________________________________________________________________________
STORE BATTERY INPUT 1 IN
POWER UP REFERENCE
AUTO POWER-DOWN
CONTROL REGISTER
AVERAGING DONE?
BATTERY INPUT 1
BAT1 REGISTER
REFERENCE IN
HOST WRITES
START CLOCK
POWER UP
SET BUSY
CONVERT
IS DATA
IS ADC
MODE?
ADC
LOW
ADC
BATTERY VOLTAGE, AUXILIARY INPUT, AND TEMPERATURE INPUT SCAN ([A/D3:A/D0] = 1011)
YES
YES
±15kV ESD-Protected Touch-Screen
NO
NO
NO
STORE AUXILIARY INPUT 1 IN
STORE AUXILIARY INPUT 2 IN
STORE BATTERY INPUT 2 IN
AUXILIARY INPUT 1
AUXILIARY INPUT 2
AVERAGING DONE?
AVERAGING DONE?
AVERAGING DONE?
BATTERY INPUT 2
AUX1 REGISTER
AUX2 REGISTER
BAT2 REGISTER
CONVERT
CONVERT
CONVERT
IS DATA
IS DATA
IS DATA
YES
YES
YES
NO
NO
STORE TEMPERATURE INPUT 1 IN
STORE TEMPERATURE INPUT 2 IN
POWER DOWN REFERENCE
TEMPERATURE INPUT 1
TEMPERATURE INPUT 2
AVERAGING DONE?
AVERAGING DONE?
TURN OFF CLOCK
TEMP1 REGISTER
TEMP2 REGISTER
SET BUSY HIGH
POWER DOWN
CONVERT
CONVERT
IS DATA
IS DATA
ADC
YES
YES
DONE
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