CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit Guide, Doc. # 001-55415 Rev. *K
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Hardware
Port D uses Port 2 for segment lines. So, the Character LCD should be removed from LCD port
while using Port D.
PSoC provides serial wire debugging (SWD) with SWD on GPIO pins option. The port pins used for
SWD are P1_0 (SWDIO) and P1_1 (SWDCK). Port D uses the P1_0 and P1_1 for Seg9 and Seg8
signals, respectively. Therefore, by default, these 2 pins are not available for pin assignment in the
‘Pins’ tab of DWR file. To enable these 2 pins for GPIO purposes, follow these steps:
1. Open the design wide resource file (with extension ‘.cydwr’).
2. Click the System tab.
3. In the Programming\Debugging section, select GPIO in the Debug Select option. Setting to GPIO
frees the pins for use as GPIOs but does not completely disable the debug interface for flash
protection purposes.
Figure 4-6. Enabling P1[0] and P1[1] as GPIO
37
GND
GND
GND
38
5 V
5 V
NC
39
VIN
VIN
NC
40
GND
GND
GND
Table 4-3. Pin Assignment Table
(continued)
Pin
Port D
Port E
PSoC LCD EBK
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