Ehong EH-MB05, Manual

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Bluetooth Audio Module
programmable strength
internal pull-up/down
37
38
GND Ground Ground
Bi-directional CMOS output,
tri-state, with weak internal
pull-up
UART_TX UART data output
CMOS input with weak
internal pull-down
39
40
UART_RX
PIO8
UART data input
Bi-directional with
programmable strength
Programmable input/output line
internal pull-up/down
Bi-directional with
41
42
PIO7
PIO6
programmable strength
internal pull-up/down Programmable input/output line
Programmable input/output line
Bi-directional with
programmable strength
internal pull-up/down
Table 8
：
PIN Terminal Description
6. Physical Interfaces
6.1. Power Supply
-
-
-
-
The module DC3.3V power input.
Power supply pin connection capacitor to chip and pin as far as possible close
Capacitor decouples power to the chip
Capacitor prevents noise coupling back to power plane.
.
Figure 2 ：
Power Supply PCB Design
Shanghai Ehong Technologies Inc