User manual

Evaluation Kit Hardware
SAM4S-EK2 User Guide 4-22
11176A–ATARM–24-Sep-12
4.5 Connectors
4.5.1 Power Supply Connector J9
The SAM4S-EK2 evaluation board can be powered from a 5V DC power supply connected to the exter-
nal power supply jack J9. The positive pole is the center pin.
Figure 4-25. Power Supply Connector J9
4.5.2 USART Connector J5 With RTS/CTS Handshake Support
Figure 4-26. Male RS232/USART Connector J5
Table 4-9. Power Supply Connector J9 Signal Descriptions
Pin Mnemonic Signal Description
1 Center +5 VCC
2 Gnd Ground reference
Table 4-10. Serial COM1 Connector J5 Signal Descriptions
Pin Mnemonic Signal Description
1, 4, 6, 9 NC NO CONNECTION
2 TXD TRANSMITTED DATA RS232 serial data output signal
3 RXD RECEIVED DATA RS232 serial data input signal
5GND GROUND
7 RTS READY TO SEND Active-positive RS232 input signal
8 CTS CLEAR TO SEND Active-positive RS232 output signal