Features: .Detects input coordinate values from resistive membrane pressure-sensitive digitizers at readout speeds up to 190 points per second using a 10-bit A/D converter..Compact size, low power, and the 3.3 V power supply operation appropriate for PDAs and other portable information-processing ...
LC19001A010: Features: .Detects input coordinate values from resistive membrane pressure-sensitive digitizers at readout speeds up to 190 points per second using a 10-bit A/D converter..Compact size, low power, ...
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. Detects input coordinate values from resistive membrane pressure-sensitive digitizers at readout speeds up to 190
points per second using a 10-bit A/D converter.
. Compact size, low power, and the 3.3 V power supply operation appropriate for PDAs and other portable information-processing equipment
. Menu area registration, duplicate coordinate processing, and 4-byte packets reduce the host CPU processing load.
. Logical exclusion of abnormal coordinates and averaging processing to remove both pen chattering noise and
noise from the LCD system
.Controller functions can be programmed by sending command data from the host CPU.
Parameter |
Symbol |
Conditions |
Rated value |
Unit | |
min |
max | ||||
Supply voltage |
VCC |
VSS 0.3 |
VSS + 7.0 |
V | |
AVCC |
Must not exceed VCC. *1 |
VSS 0.3 |
VCC + 0.3 |
V | |
A/D converter reference input voltage |
AVR |
Must not exceed AVCC + 0.3 V. |
VSS 0.3 |
VCC + 0.3 |
V |
Input voltage |
VI |
*2 |
VSS 0.3 |
VCC + 0.3 |
V |
Output voltage |
VO1 |
*2 |
VSS 0.3 |
VCC + 0.3 |
V |
Maximum low-level output current |
IOL |
20 |
mA | ||
Average low-level output current |
IOLAV |
The average value of (operating current ´ operating ratio) |
4 |
mA | |
Maximum total low-level output current |
IOL |
100 |
mA | ||
Average total low-level output current |
IOLAV |
The average value of (operating current ´ operating ratio) |
40 |
mA | |
Maximum high-level output current |
IOH |
-20 |
mA | ||
Average high-level output current |
IOHAV |
The average value of (operating current ´ operating ratio) |
-4 |
mA | |
Maximum total high-level output current |
IOH |
-50 |
mA | ||
Average total high-level output current |
IOHAV |
The average value of (operating current ´ operating ratio) |
-20 |
mA | |
Power dissipation |
Pd |
300 |
mW | ||
Operating temperature |
Ta |
-40 |
+85 |
°C | |
Storage temperature |
Tstg |
-55 |
+150 |
°C |
Note: 1. The LC19001A010 must be used with AVCC and VCC at the same potential. Also, applications must assure that AVCC does not exceed VCC at power on.
2. VI and VO1 must not exceed VCC + 0.3 V.
<Notes> This LSI can be permanently damaged by use at stresses in excess of the absolute maximum ratings. It is desirable that the LC19001A010 be operated within the recommended operating conditions during normal operation. In particular, the LSI's reliability may be adversely affected if these conditions are exceeded.
The LC19001A010 provides rapid and precise position detection for the resistive membrane pressure-sensitive digitizers used in PDAs and other portable informationprocessing equipment. It implements, in a single chip, the coordinate readout processing required for pen input operations.
This controller provides the following functions: digitizer voltage A/D conversion, noise exclusion, conversion to display coordinates, and data transfer to the host CPU.