
15 RSB-4210 User Manual
Chapter 2 H/W Installation
2.2.6 Pin Header for COM4, 3.3V TTL (TX/RX/RTS/CTS) (CN6)
CN6 is a 4-wire (TX/RX/RTS/CTS) 3.3 V TTL signal which provides connections
between serial devices (For example, GPS, GSM and Bluetooth devices etc.) or a
communication network.
Figure 2.11 Pin Header for COM4, 3.3V TTL (TX/RX/RTS/CTS)
2.2.7 Pin Header for I2S (CN7)
RSB-4210 provides one I2S interface for users to expand their applications, and CN7
is the pin header for the I2S interface.
Figure 2.12 Pin Header for I2S
Pin Description Pin Description
1N/C 2 N/C
3 COM5_RXD 4 COM5_RTS
5 COM5_TXD 6 COM5_CTS
7N/C 8 N/C
9GND 10N/C
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