UM026704-0816
Keypad Circuit
S3F80QB Development Kit
User Manual
18
Keypad Circuit
The keypad circuit features 16 switches connected to eight pins on the MCU. These pins
are configured as outputs for P1.3–P1.0, and are configured as inputs with pull-ups
enabled for P0.7–P0.4. The keypad circuit is shown in Figure 18.
ISP II Connector
The ISP II connector (J6) provides an interface between the S3 Flash ISP II tool and the
S3F80QB device. See Figure 19 for an illustration of the ISP II connector.
Figure 17. The Reset Circuit
Figure 18. The Keypad Circuit
