Integration Manual
Table Of Contents
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Supply interfaces
- 1.5.1 Module supply input (VCC)
- 1.5.1.1 VCC supply requirements
- 1.5.1.2 VCC current consumption in 2G connected mode
- 1.5.1.3 VCC current consumption in 3G connected mode
- 1.5.1.4 VCC current consumption in LTE connected mode
- 1.5.1.5 VCC current consumption in cyclic low power idle mode / active mode
- 1.5.1.6 VCC current consumption in fixed active mode
- 1.5.2 Generic digital interfaces supply output (V_INT)
- 1.5.1 Module supply input (VCC)
- 1.6 System function interfaces
- 1.7 Antenna interfaces
- 1.8 SIM interfaces
- 1.9 Data communication interfaces
- 1.10 eMMC interface
- 1.11 Digital Audio interfaces
- 1.12 ADC interfaces
- 1.13 General Purpose Input/Output
- 1.14 Reserved pins (RSVD)
- 1.15 System features
- 1.15.1 Network indication
- 1.15.2 Jamming detection
- 1.15.3 IP modes of operation
- 1.15.4 Dual stack IPv4 and IPv6
- 1.15.5 Embedded TCP/IP and UDP/IP
- 1.15.6 Embedded FTP and FTPS
- 1.15.7 Embedded HTTP and HTTPS
- 1.15.8 SSL and TLS
- 1.15.9 Firmware update Over AT (FOAT)
- 1.15.10 Firmware update Over The Air (FOTA)
- 1.15.11 Power Saving
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC)
- 2.2.1.1 General guidelines for VCC supply circuit selection and design
- 2.2.1.2 Guidelines for VCC supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC supply circuit design using a LDO linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary battery
- 2.2.1.6 Additional guidelines for VCC supply circuit design
- 2.2.1.7 Guidelines for the external battery charging circuit
- 2.2.1.8 Guidelines for external charging and power path management circuit
- 2.2.1.9 Guidelines for removing VCC supply
- 2.2.1.10 Guidelines for VCC supply layout design
- 2.2.1.11 Guidelines for grounding layout design
- 2.2.2 Generic digital interfaces supply output (V_INT)
- 2.2.1 Module supply (VCC)
- 2.3 System functions interfaces
- 2.4 Antenna interface
- 2.5 SIM interfaces
- 2.6 Data communication interfaces
- 2.7 eMMC interface
- 2.8 Digital Audio interface
- 2.9 ADC interfaces
- 2.10 General Purpose Input/Output
- 2.11 Reserved pins (RSVD)
- 2.12 Module placement
- 2.13 Module footprint and paste mask
- 2.14 Thermal guidelines
- 2.15 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- 6 FCC Notes
- Appendix
- Glossary
- Related documents
- Revision history
- Contact
TOBY-L3 series - System Integration Manual
TSD-19090601 - R13 System Integration Manual Page 115 of 143
The module’s PCM interface (mast mode) is connected to the related pins of the external audio codec
(slave mode).
The external audio codec is controlled by the TOBY-L3 series module using the DDC (I2C) interfaces
(I2C_SDA1, I2C_SCL1) which can be configured through AT command. For more details, see the TOBY-
L3 series AT Commands Manual [2].
The VDD_INT output supplies the external audio codec (SPKVDD, MICVDD, DBVDD and AVDO1 pins),
the MICVDD pin of the ALC5660 is supplied by the 3.3 V output through the LDO regulator, defining
proper digital interfaces voltage level.
Specific AT commands are available to configure the Realtek ALS5660 audio codec: for more details, see
the TOBY-L3 series AT Commands Manual [2].
As various external audio codecs other than the one described in Figure 58 and Table 45 can be used to
provide voice capability, the appropriate specific application circuit has to be implemented and configured
according to the particular external digital audio device or audio codec used and according to the
application requirements.
TOBY-L3series
BCLK
LRCK
DACDAT
ADCDAT
GND
52
I2S_CLK
50
I2S_WA
51
I2S_TXD
53
I2S_RXD
ALC5660
Audio Codec
DGND
SPKVDD
I2C_SDA
I2C_SCL
204
I2C_SDA1
203
I2C_SCL1
C2
C1
AGND
SP0_P
SP0_N
MICBIAS1
Microphone
Connector MIC
C12
D2
J2
C13
C14
R3
D1
J1
R2
Speaker SPK
Connector
SPKGND
MCLK
49
CODEC_CLK
11
10
9
8
7
17
16
24
28
GPIO2/DMIC_SDA 6
GPIO1/IRQ/DMIC_SCL
15
VREF
VREF33
20
27
23
25
32
IN1P/DMIC_SDA
IN1N
1
2
26
MICVDD
18
C4
C3
V_INT
5
R1
LDO regulator
3V3
VCC
U1
C9
OUTIN
SENSE
BYP
SHDNn
GND
C10
DBVDD
18
C5
C6
DCVDD
14
C11
AVDD1/DACREF
4
C7
C8
R4
R5
C15
C16
VCC
U2
Figure 58: Digital audio interface application circuit with an external ACL5660 audio codec to provide voice capability
Reference
Description
Part Number - Manufacturer
C1,C3,C5,C6,C7
100 nF Capacitor Ceramic X5R 0402 10% 10V
GRM155R71C104KA01 – Murata
C2
47 µF Capacitor Ceramic X5R 0805 20% 6.3 V
GRT21BR60J476ME13L – Murata
C4,C8
2.2 µF Capacitor Ceramic X5R 0805 20% 16 V
GRT21BR61C226ME3L – Murata
C9,C11,C13,C14
1 µF Capacitor Ceramic X7R 0603 10% 25 V
GRM188R71E105KA12 - Murata
C10
10 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C103KA01 - Murata
C12,C15,C16
4.7 µF Capacitor Ceramic X5R 0805 10% 10V
GRT21BR61A475KE13L - Murata
R1
470 k Resistor 0402 5% 0.1 W
RK73B1ETTD474J - KOA