Bluetooth Audio Module
Ehong Technology Co., Ltd
1. Contents
1.
Description
......................................................................................................................................................... 4
2.
Application
......................................................................................................................................................... 4
3.
EH-MB18 Product numbering
........................................................................................................................ 4
4.
Electrical Characteristic
.................................................................................................................................. 5
4.1.
Recommend operation conditions
............................................................................................................ 5
4.2.
Absolute Maximum Rating
......................................................................................................................... 5
4.3.
Power consumptions
.................................................................................................................................. 5
4.4.
Input/output Terminal Characteristics
...................................................................................................... 7
4.4.1.
Digital Terminals
.................................................................................................................................. 7
4.4.2.
USB
....................................................................................................................................................... 8
4.4.3.
Internal CODEC Analogue to Digital Converter
.............................................................................. 8
4.4.4.
Internal CODEC Digital to Analogue Converter
.............................................................................. 9
5.
Pinout and Terminal Description
................................................................................................................ 10
5.1.
Pin assignment
.......................................................................................................................................... 10
6.
Physical Interfaces
......................................................................................................................................... 13
6.1.
Power Supply
............................................................................................................................................. 13
6.2.
Reset
........................................................................................................................................................... 13
6.3.
PIO
.............................................................................................................................................................. 14
6.4.
AIO
.............................................................................................................................................................. 14
6.5.
RF interface
............................................................................................................................................... 14
6.6.
UART
.......................................................................................................................................................... 14
6.7.
I2C Master
.................................................................................................................................................. 15
6.8.
Apple iOS CP reference design
.............................................................................................................. 16
6.9.
Digital Audio Interfaces
............................................................................................................................ 17
6.9.1.
PCM
.................................................................................................................................................... 18
6.9.2.
Digital Audio Interface (I2S)
............................................................................................................. 19
6.9.3.
IEC 60958 Interface (SPDIF)
.......................................................................................................... 22
6.10.
Microphone input
................................................................................................................................... 23
6.11.
Analog Output stage
............................................................................................................................. 24
6.12.
USB
......................................................................................................................................................... 24
7.
EH-MB18 Reference Design
......................................................................................................................... 26
