CY8CMBR2016-24LQXI Cypress Semiconductor, CY8CMBR2016-24LQXI Datasheet - Page 10

• Manufacturer Part Number: CY8CMBR2016-24LQXI
• Description: Touch Screen Converters & Controllers
• Manufacturer: Cypress Semiconductor
• Type: Capacitive Touch Controllersr

Specifications of CY8CMBR2016-24LQXI

• Rohs: yes
• Input Type: 16 Key
• Supply Voltage: 1.71 V to 5.5 V
• Supply Current: 3.3 mA
• Operating Temperature: - 40 C to + 85 C
• Package / Case: QFN-48
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 490
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 1.71 V

Truth Table Output
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Encoded 4-bit Output
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Document Number: 001-67921 Rev. *C
Figure 7. Truth Table Output
Another output interface providing matrix outputs.
All pins are output pins - divided into ROW/COLUMN.
Only one button can be reported at a time - cannot be used in
conjunction with FSS disabled.
Button status is reported in an encoded ROW/COLUMN
fashion as shown in
Each button has its own ROW-COLUMN code.
Easy to integrate into a system requiring a simple interface with
single key press requirement.
OUT4 to OUT7 in the pin out form the ROW lines and OUT0
to OUT3 form the COLUMN lines.
Only 4 pins to report a button press out of 16 buttons.
Each button has its own code.
Only one button can be reported at a time using this interface.
Table 4
defines the decode table.
Figure
7.
Table 4. Encoded Output
Buzzer Signal Output
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Interrupt Line
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Button Auto Reset
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Key #1
Key #2
Key #3
Key #4
…
Key #16
No keys pressed
A dedicated pin for buzzer output is provided in the device.
Buzzer output can be used to drive an p-type transistor driving
a buzzer or directly a DC buzzer up to 10 mA sink current.
An interrupt line to the host controller.
On a button touch, the device pulls the INT line HIGH to indicate
an interrupt to the host. The INT line remains HIGH as long as
a button is touched.
Can be used as a latch input at the host side to read the OUT
lines.
Can also be used as an interrupt line for the host controller to
read the OUT lines.
Prevents button stuck, due to any conducting object placed
close to a button.
Useful when output to be kept ON only for a specific time.
The Button Auto Reset period is controlled by the hardware
configuration on the ARST pin. Refer
page 26
When touched, a button is treated active for a maximum of
Button Auto Reset period (refer to
After the button is released the CSx will be hold for 440 ms.
Keypress Detected By
for pin configuration details.
CapSense
Figure
CY8CMBR2016
EO[3:0]
XXXX
0000
0001
0010
Table 18
0011
1111
…
8).
in
Page 10 of 28
Appendix on
Interrupt
Time
1
1
1
1
1
1
0