31
31
2. during development procedure, we found that some LCD pins are not high resistor mode when
powering, and it may effect boot pin electrical mode, so we kindly suggest users to add a buffer
chip between LCD and CPU, chip model SN74AVC16245 is recommended, as for circuit please
refer to LCD part.
3.4.5 UART
The carrier board is with one debug port and one general TTL port
The debug port is a RS232 by DB9 male header, if your PC is without RS232, please expand it by
USB.
UART1 is debug port, 3-wire, 3.3V, it’s converted to be RS232 by MAX3232(U4), pinned out by
P19(DB9)
UART2 is pinned out by 10P headers with pitch of 2mm, 3-wire, 3.3V.
Summary of Contents for SBC OK1052-C
Page 14: ...14 14 2 5 SoM FET1052 C Pin Definition 2 5 1 SoM Connector Schematic P1 P2...
Page 25: ...25 25 Chapter 3 OK1052 C Carrier Board Introduction 3 1 Overview of OK1052 C...
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