Cypress Semiconductor CY3280-MBR3 ユーザーズマニュアル

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B

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Hardware

Figure 4-14.  Sensor Indicator LEDs

Note: The sensor indicator LEDs are connected to the adjustable voltage, VADJ, which is the output
of the LDO regulator (U2-MIC 5219). The anode of all the LEDs is connected to VADJ, which is high.
Therefore, these are all active-low LEDs.

4.3.6

Buzzer, Shield, and Host Interrupt Multiplexing Jumper

The CS15 pin of the MBR3 device is multiplexed for the CapSense button, host interrupt, and shield
electrode. Similarly, GPO7 is multiplexed for general-purpose output, host interrupt, and buzzer out-
put. All three features – host interrupt, buzzer, and shield electrode (water tolerance) cannot be
enabled simultaneously. These features can be enabled using the multiplexing jumper J15, which
has three combinations.

Note: If water tolerance (shield) is not used and only buzzer or host interrupt features are used, then
the shield pin must be connected to ground by shorting pins 5 and 6 of jumper J15.

See the 

 and the schematic for more details.

Table 4-3.  J15 Combinations

A

Buzzer on GPO7, Host Interrupt on CS15

B

Host Interrupt on GPO7, Shield on CS15

C

Buzzer on GPO7, Shield on CS15