36
36
Note:
1. when resistive touching is not used, the 4-wire resistive touching pins could be used as general
IO, when the four pins are used for AD, its voltage is 0~3.3V
2. we kindly suggest users to use buffer chip SN74AVC16245 between CPU and LCD
3.4.11 USB OTG
USB OTG is short for USB On-The-Go.
On OK1052-C schematic below, P21 is Micro USB connector, its ID pin (pin 4) is used for USB
host or slave recognizing, and control switch consists of channel field effect transistor to supply
power to Micro USB, the enable terminal of this electronic switch is jut the ID pin of OTG, when
OTG USB work in Host mode, the 4
th
pin (ID signal) of USB OTG is low level, breakover Q9 and
Q1 two field effect transistor, VCC5V supplies power to OTG1_VBUS, then users could mount
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...
Page 34: ...34 34...
Page 42: ...42 42...
Page 45: ...45 45...
