Bluetrum Technology BT8812E2 User manual

Bluetrum Technology
BT8812E2
Audio Player Microcontroller
Versions: 0.0.1
2020/02/04
Declaration
Copyright © 2019, www. bluetrum.com.
All Rights Reserved. No Unauthorized Distribution.
Bluetrum reserves the right to make changes without further notice to any products herein
to improve reliability, function or design.
For further information on the technology, product and business term, please contact
Bluetrum Company.
For sales or technical support, please send email to the address:
Sales: [e-mail]
Technical: [e-mail]

Bluetrum Technology
Revision History
Date
Version
Comments
Revised by
2020-02-04
0.0.1
First draft
Leo

Table of content 3
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Table of Contents
TABLE OF CONTENTS............................................................................................................................................. 3
1PRODUCT FEATURES ..................................................................................................................................... 4
2PACKAGE DEFINITION ................................................................................................................................... 5
2.1 PIN ASSIGNMENT..................................................................................................................................................5
2.2 PIN DESCRIPTIONS ................................................................................................................................................6
3CHARACTERISTICS......................................................................................................................................... 8
3.1 PMU PARAMETERS............................................................................................................................................... 8
3.2 IO PARAMETERS ...................................................................................................................................................8
3.3 AUDIO DAC PARAMETERS ......................................................................................................................................9
3.4 AUDIO ADC PARAMETERS ......................................................................................................................................9
3.5 BT PARAMETERS................................................................................................................................................... 9
3.6 CURRENT PARAMETERS ........................................................................................................................................10
4PACKAGE INFORMATION ............................................................................................................................ 11

1Product Features 4
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1Product Features
CPU and Flexible IO
32bit High performance CPU with DSP
instruction
Program memory: internal 2M bit flash
Flexible GPIO pins with Programmable pull-up
and pull-down resistors;
Support GPIO wakeup or interrupt;
Bluetooth Radio
Compliant to Bluetooth 5.0 specification
(QDID: 115952);
TX output power +2dBm in typical;
RX Sensitivity with -90.5dBm @Basic Rate;
Audio Interface
Audio codec with 16bit mono DAC and 16bit
mono ADC;
Support flexible audio EQ adjust;
Support Sample rate 8, 11.025, 12, 16, 22.05,
32, 44.1 and 48KHz;
Mono MIC amplifier input;
High performance mono audio ADC with
90dB SNR;
High performance mono audio DAC with
95dB SNR, with headphone amplifier output;
Peripheral and Interfaces
Three 32-bit timers;
One multi-function 32-bit timers, support
Capture and PWM mode;
WatchDog;
Three full-duplex UART;
Sixteen Channels 10-bit SARADC;
Build in PMU, such as Charger/Buck/LDO;
Package
QFN32L;
Temperature
Operating temperature: -40℃to +85℃;
Storage temperature: -65℃to +150℃;

2Package Definition 5
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2Package Definition
2.1Pin Assignment
Figure 2-1 Pin assignment for QFN32L

2Package Definition 6
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2.2Pin Descriptions
Table 2-1 QFN32L pin description
Pin No.
Name
Type
Function
0
E-GND
GND
E-Pad Ground
1
NC
-
-
2
PE7
I/O
ADC9
TX0-G4
HSTRX-G4
PE7
3
PE0
I/O
TX0-G6
PE0
4
NC
-
-
5
VUSB
PWR
VUSB power input
6
VDDIO
PWR
VDDIO power output
7
VBAT
PWR
VBAT power input
8
LX
PWR
Buck inductor connect pin
9
DGND
GND
Digital Ground
10
VDDBT
PWR
BT power
11
NC
-
-
12
NC
-
-
13
PWRKEY
A
Power key input
14
BT_RFGND
GND
BT RF Ground
15
BT_ANT
A
BTANT
16
BT_AVDD
PWR
BT power
17
BT_OSCI
A
26M OSC input
18
BT_OSCO
A
26M OSC output
19
PB4
I/O
ADC6
SPI0CLK-G3
RX0-G3
HSTRX-G8
PB4
20
PB3
I/O
ADC5
SPI0DO-G3
TX0-G3
HSTRX-G3
PWM2-T3
PB3
21
AUXR0/PA7
I/O
ADC2
AUXR0
TX0-G1
TX1-G1
HSTRX-G1
PWM1-T3
PA7
22
AUXL0/PA6
I/O
ADC1
AUXL0
RX0-G1
RX1-G1
HSTRX-G6

2Package Definition 7
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PWM0-T3
PA6
23
NC
-
-
24
MICL/PF2
I/O
ADC10
MIC
TX0-G7
PF2
25
NC
-
-
26
NC
-
-
27
VCMBUF
A
VCM buffer output
28
DACL
A
DAC L
29
VDDDAC
PWR
DAC power output
30
VDDPA
PWR
PA power input
31
NC
-
-
32
AGND
GND
DAC Ground
Note: I/O: Digital input/output; I : Digital input; A : Analog Pin; PWR: Power Pin; GND: Ground.

3Characteristics 8
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3Characteristics
3.1 PMU Parameters
Table 3-1 PMU voltage input Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
VUSB
Charger Voltage input
3.0
5.0
5.5
V
VBAT
Voltage input
3.0
3.7
5.0
V
Table 3-2 3.3V LDO Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
VDDIO
3.3V LDO voltage output
-
3.3
-
V
Light Loading condition
△VVDDIO
Output Mismatch 1-sigma
-
56
-
mV
VDDIO=3.3v
ILOAD
Maximum output current
-
-
150
mA
@VBAT=3.6v
ISC
Short Circuit Current Limit
-
-
300
mA
@VBAT=3.8v
Table 3-3 1.6V LDO Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
VDDBT
1.6V LDO voltage output
-
1.6
-
V
Light Loading condition
△VVDDBT
Output Mismatch 1-sigma
-
27
-
mV
VDDBT=1.6v
ILOAD
Maximum output current
-
-
100
mA
@VBAT=3.0v
ISC
Short Circuit Current Limit
-
-
200
mA
@VBAT=3.8v
Table 3-4 1.2V LDO Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
VDDCORE
1.2V LDO voltage output
-
1.2
-
V
Light Loading condition
△VVDDCORE
Output Mismatch 1-sigma
-
20
-
mV
VDDCORE=1.2v
ILOAD
Maximum output current
-
-
80
mA
@VBAT=3.6v
ISC
Short Circuit Current Limit
-
-
120
mA
@VBAT=3.8v
3.2 IO Parameters
Table 3-5 I/O Parameters
GPIO—Electrical Characteristics
Symbol
Description
Related GPIO
Min
Typical
Max
Units
Conditions
VIL
Low-level input voltage
-0.3
1.27
V
VDDIO=3.3V
VIH
High-level input voltage
2.03
3.6
V
VDDIO=3.3V
DriverAbility 1
Output DriverAbility 1
32
mA
VDDIO=3.3V
DriverAbility 0
Output DriverAbility 0
8
mA
VDDIO=3.3V
RPUP0
Internal pull-up resister 0
8
10
12
KΩ
RPUP1
Internal pull-up resister 1
0.24
0.3
0.36
KΩ
RPUP2
Internal pull-up resister 2
160
200
240
KΩ
RPDN0
Internal pull-down resister 0
8
10
12
KΩ
RPDN1
Internal pull-down resister 1
0.24
0.3
0.36
KΩ
RPDN2
Internal pull-down resister 2
160
200
240
KΩ

3Characteristics 9
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3.3 Audio DAC Parameters
Table 3-6 Audio DAC Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
SNR
-
96
-
dB
VCM cap=1uF
VDDDAC cap=1uF
with A-wt filter
Output -3dBV
Fin=1KHz
THD+N
-
-86
-
dB
VCM cap=1uF
VDDDAC cap=1uF
with A-wt filter
Output -3dBV with 10K loading
Fin=1KHz
Output Range
Maximum output voltage
-
2.6
Vpeak-peak
32ohm Loading
3.4 Audio ADC Parameters
Table 3-7 Audio ADC Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
SNR
-
90
-
dB
VCM cap=1uF
VDDDAC cap=1uF
with A-wt filter
Input sine amplitude, 850mV
RMS
Fin=1KHz
THD+N
-
-87
-
dB
VCM cap=1uF
VDDDAC cap=1uF
with A-wt filter
Input sine amplitude, 850mV
RMS
Fin=1KHz.
Input Range
Input sine wave peak amplitude
0
VCM
V
From aux input, aux 0db gain,
VCM represent VCM voltage.
3.5BT Parameters
Table 3-8 BT Parameters
Characteristics
Min
Typical
Max
Unit
Conditions
Maximum Transmit Power
-
-
7
dBm
RMS DEVM
-
5.5
-
%
Maximum TX power
2-DH5 packet
Peak DEVM
-
12.5
%
EDR Relative Transmit Power
-0.2
dB
Sensitivity @ Basic Rate
-90.5
dBm
BER=0.1%, using DH5 packet
Sensitivity @ EDR
-89.5
dBm
BER=0.01%, using 2-DH5 packet

3Characteristics 10
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3.6 Current Parameters
Table 3-9 Current Parameters
Sym
Characteristics
Min
Typ
Max
Unit
Conditions
IRTC
RTC mode current
-
4
-
uA
4.2V input, room temp.
Sleep
Sleep current
-
500
2000
uA
3.3V input, room temp

4Package Information 11
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4Package Information
QFN4X4-32L(P0.4T0.75)

4Package Information 12
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