Cypress Semiconductor Cy8CKIT-050 Cy8CKIT-050B ユーザーズマニュアル
製品コード
Cy8CKIT-050B
24
CY8CKIT-050 PSoC® 5LP Development Kit Guide, Doc. # 001-65816 Rev. *E
Hardware
Figure 4-7. Boost Converter
4.2.5
32-kHz and 24-MHz Crystal
PSoC 5LP has an on-chip real time clock (RTC), which can function in sleep. This requires an
external 32-kHz crystal, which is provided on the board to facilitate RTC-based designs. The PSoC
5LP also has an external MHz crystal option in applications where the IMO tolerance is not
satisfactory. In these applications, the board has a 24-MHz crystal to provide an accurate main
oscillator.
external 32-kHz crystal, which is provided on the board to facilitate RTC-based designs. The PSoC
5LP also has an external MHz crystal option in applications where the IMO tolerance is not
satisfactory. In these applications, the board has a 24-MHz crystal to provide an accurate main
oscillator.
4.2.6
Protection Circuit
A reverse-voltage and over-voltage protection circuit is added at the expansion port on 5 V and 3.3 V
lines.
lines.
The protection circuit consists of two P-channel MOSFET on the power line allowing the power/cur-
rent to flow from input to output depending on the voltages applied at the external board connector.
Figure 2 and Figure 3 are protection circuits placed between EBK and the on board components on
the 5V and 3.3V line.
rent to flow from input to output depending on the voltages applied at the external board connector.
Figure 2 and Figure 3 are protection circuits placed between EBK and the on board components on
the 5V and 3.3V line.
On 5V power line: