Integration Manual
Table Of Contents
- Document information
- 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 LTE connected mode
- 1.5.1.3 VCC consumption in deep-sleep mode (low power mode and PSM enabled)
- 1.5.1.4 VCC current consumption in low power idle mode (low power mode enabled)
- 1.5.1.5 VCC current consumption in active mode (low power mode and PSM disabled)
- 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 interface
- 1.9 Data communication interfaces
- 1.10 Audio
- 1.11 General purpose input / output (GPIO)
- 1.12 Reserved pin (RSVD)
- 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 low drop-out 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 Guidelines for external battery charging circuit
- 2.2.1.7 Guidelines for external charging and power path management circuit
- 2.2.1.8 Guidelines for removing VCC supply
- 2.2.1.9 Additional guidelines for VCC supply circuit design
- 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 interfaces
- 2.5 SIM interface
- 2.6 Data communication interfaces
- 2.6.1 UART interfaces
- 2.6.1.1 Guidelines for UART circuit design
- Providing 1 UART with the full RS-232 functionality (using the complete V.24 link)
- Providing 1 UART with the TXD, RXD, RTS, CTS, DTR and RI lines only
- Providing 1 UART with the TXD, RXD, RTS and CTS lines only
- Providing 2 UARTs with the TXD, RXD, RTS and CTS lines only
- Providing 1 UART with the TXD and RXD lines only
- Providing 2 UARTs with the TXD and RXD lines only
- Additional considerations
- 2.6.1.2 Guidelines for UART layout design
- 2.6.1.1 Guidelines for UART circuit design
- 2.6.2 USB interface
- 2.6.3 SPI interfaces
- 2.6.4 SDIO interface
- 2.6.5 DDC (I2C) interface
- 2.6.1 UART interfaces
- 2.7 Audio
- 2.8 General purpose input / output (GPIO)
- 2.9 Reserved pin (RSVD)
- 2.10 Module placement
- 2.11 Module footprint and paste mask
- 2.12 Schematic for SARA-R5 series module integration
- 2.13 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- Appendix
- A Migration between SARA modules
- B Glossary
- Related documents
- Revision history
- Contact
SARA-R5 series - System integration manual
UBX-19041356 - R03 System description Page 17 of 123
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1.5 Supply interfaces
1.5.1 Module supply input (VCC)
The modules must be supplied via the three VCC pins that represent the module power supply input.
Voltage must be stable, because during operation, the current drawn by the SARA-R5 series modules
through the VCC pins may vary significantly, depending on the operating mode and state (as
described in sections 1.5.1.2, 1.5.1.3, 1.5.1.4 and 1.5.1.5).
It is important that the supply source is able to withstand the average current consumption occurring
during Tx / Rx call at maximum RF power level (see the SARA-R5 series data sheet [1]).
The 3 VCC pins of SARA-R5 series modules are internally connected each other to both the internal
Power Amplifier and the internal baseband Power Management Unit.
Figure 6 provides a simplified block diagram of SARA-R5 series modules’ internal VCC supply routing.
53
VCC
52
VCC
51
VCC
SARA-R5 series
Power
Management
Unit
Memory
Baseband
Processor
Transceiver
Power
Amplifier
Figure 6: Block diagram of SARA-R5 series modules’ internal VCC supply routing
1.5.1.1 VCC supply requirements
Table 5 summarizes the requirements for the VCC modules supply. See section 2.2.1 for suggestions
to correctly design a VCC supply circuit compliant with the requirements listed in Table 5.
⚠ The supply circuit affects the RF compliance of the device integrating SARA-R5 series modules
with applicable required certification schemes as well as antenna circuit design. Compliance is
guaranteed if the requirements summarized in the Table 5 are fulfilled.
Item
Requirement
Remark
VCC nominal voltage
Within VCC normal operating range:
3.3 V / 4.4 V
RF performance is guaranteed when VCC voltage is
inside the normal operating range limits.
RF performance may be affected when VCC
voltage is outside the normal operating range
limits, though the module is still fully functional
until the VCC voltage is inside the extended
operating range limits.
VCC voltage during
normal operation
Within VCC extended operating range:
3.0 V / 4.5 V
VCC voltage must be above the extended
operating range minimum limit to switch-on the
module.
The module may switch-off when the VCC voltage
drops below the extended operating range
minimum limit.
Operation above VCC extended operating range is
not recommended and may affect device reliability.