RK3288 Hardware Design Guide
6 GPIO
6.1 Schematic
In actual produce design, if GPIO defined by RK need to be revised, notice to match IO
level with GPIO pull-up and pull- down features, otherwise it may cause abnormal
operation.RK3288 GPIO can be pulled up or down as an input, and it can be configurable and
closed after power on, as shown in figure 6-1, “_d” remarked in schematic diagram is an
default for internal pull down, “_u” is pull up. Any modification requirements, please refer to
RK3288_IO_LIST released by RK.
Fig 6-1
RK3288, BS_JTAG_TRSTn should be connected to GND and APIO2_VDD should connect to
POWER in application of RK3288, or it will cause abnormal working of chip at the Power-on
stage.
Fig 6-2
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