ZWIR4512AC1RA Datasheet ZWIR4512AC2WI, ZWIR4512AC1WI, ZWIR4512AC1WA | P7-P9

ZWIR4512

Datasheet

January 27, 2016

1.2.2. Current Consumption per Operating Mode

Operating Mode Condition Typ

Unit

Run Mode

Receiver active 10.5

Transmitter active, EU frequency band, BPSK, 0dBm 16.1

Transmitter active, EU frequency band, QPSK, 0dBm 15.5

Transmitter active, EU frequency band, BPSK, 5dBm 23.4

Transmitter active, EU frequency band, QPSK, 5dBm 22.8

Transmitter active, US frequency band, BPSK, 0dBm 14.9

Transmitter active, US frequency band, QPSK, 0dBm 14.2

Transmitter active, US frequency band, BPSK, 5dBm 18.0

Transmitter active, US frequency band, QPSK, 5dBm 17.3

Transmitter active, US frequency band, BPSK, 10dBm 24.0

Transmitter active, US frequency band, QPSK, 10dBm 23.4

TRX Off 0.7

Stop Mode TRX Off, RTC running 26.5

µA

Standby Mode TRX Off, RTC running 3.5

1) Current consumption values refer to devices operating at 25°C with network stack library version 1.9 and an application that does not generate a

workload on the MCU.

2 Module Description

The ZWIR4512 is a programmable wireless IPv6 communication module. Communication is based on

6LoWPAN, a free and open communication standard developed by the Internet Engineering Task Force (IETF).

This standard specifies how to transmit IPv6 (Internet Protocol Version 6) packets over low-power wireless

personal area networks.

ZWIR4512 modules are available with a preprogrammed command interface, allowing modem-like

communication based on simple commands sent over a serial interface. Alternatively, the module is freely

programmable on the basis of an application programming interface (API) that exposes abstract communication

functionality to the programmer.

Both software options offer secure communication on the basis of the IP Security (IPSec) protocol suite.

Additionally, an implementation of the Internet Key Exchange Protocol version 2 (IKEv2) is provided, in order to

make key management as easy as possible. IPSec and IKEv2 are the mandated standards for securing IPv6

networks. Refer to ZWIR45xx Application Note—Using IPSec and IKEv2 in 6LoWPANs for more detailed

information about IPSec and IKEv2.

ZWIR4512

Datasheet

January 27, 2016

The module comprises an STM32F103RC ARM

Cortex™-M3 microcontroller from ST Microelectronics and a

ZWIR4502 transceiver from IDT. These components ensure leading-edge performance values at very low power

consumption. The module provides a hardware-programmed 64-bit MAC address that is guaranteed to be

globally unique.

2.1. Radio Transceiver

The module includes IDT’s ZWIR4502 radio transceiver. This circuit performs modulation and demodulation of

outgoing and incoming data, respectively. The modulation scheme is configurable according to the IEEE802.15.4

standard. The radio transceiver is never accessed directly by application code. This task is performed by the

communication stack, which encapsulates such low-level functionality in abstract functions.

2.2. Microcontroller

The protocol stack and the user application are executed on an STM32F103RC microcontroller (MCU) from ST

Microelectronics. It provides 256 kB flash and 48 kB SRAM memory. The MCU provides a rich set of peripherals

and a number of general purpose input/output (GPIO) ports. The GPIO ports of the module are directly

connected to the GPIOs of the MCU. Refer to Table 4.1 for an exact mapping.

2.2.1. MCU Core

The MCU core is an ARM

Cortex™-M3. This is a 32-bit RISC core with a performance of 1.25 DMIPS/MHz.

Using IDT’s software stack, the maximum operating frequency is 64 MHz. This allows for computational intensive

applications. In order to save power, the core can be shut off completely, waking up only on external activity.

2.2.2. Peripherals and Interfaces

The module was designed to make maximum use of the controller’s internal peripherals. Up to 21 digital general

purpose I/Os can be used by the application. Most of these I/Os have alternative functions. Some of them are

5V-tolerant. Table 4.1 shows the most commonly used functions available for each interface. Table 4.3 shows all

functionalities on a single page, indicating which peripherals must not be used in parallel as their GPIOs are

interfering.

In addition to communication interfaces, the module also provides signal conversion peripherals. Three analog-

to-digital converters (ADCs), two digital-to-analog converters (DACs) and two pulse-width modulation (PWM)

peripherals are available.

2.2.3. Programming and Debugging

Programming and debugging the module is typically done via JTAG. All required MCU ports are connected to

module pins for that purpose. Alternatively, Serial Wire Debug (SWD) can be used for programming and

debugging. This requires just two pins that have to be reserved, providing two additional GPIO pins.

Alternatively, if debug functionality is not required, it is possible to program the module over a two-wire UART

interface. For that purpose, the MCU’s internal boot-loader must be started. This is done by holding the BSEL pin

of the module high while a reset is performed or the module is powered on. Refer to the MCU documentation for

more information about serial programming.

ZWIR4512

Datasheet

January 27, 2016

2.3. Firmware

2.3.1. Serial Command Interface (SCI) Firmware

A module programmed with the Serial Command Interface firmware acts as a network processor. In this

configuration, the module is controlled over a serial interface that is SPI, USB, or one of the two UARTs. The SCI

firmware provides all standard communication functions for data transmission and reception, as well as all

security functions and over-the-air update (OTAU) functionality. Access to internal peripherals is limited to digital

control of the GPIO pins. Typically, an external microcontroller or a PC is required to control module operation.

However, for simple sensing or acting applications, it is also possible to configure the module to run

autonomously without the need for an external controller. Refer to the ZWIR45xx Serial Command Interface

Manual for further information.

2.3.2. C Application Programming Interface (C-API)

A C-API is provided for applications that should run directly on the embedded microcontroller. Communication

and security functionalities are encapsulated in a set of libraries that export functions for accessing and

controlling them. The library architecture is modular, allowing tailoring applications to user needs. Applications

running on the microcontroller can make use of the rich set of peripherals that are provided by the controller.

Depending on the library configuration, there are up to 192 kB of flash and 32 kB of RAM available for the user

application. This is sufficient even for complex applications with high memory needs. If over-the-air update

(OTAU) functionality is required, the amount of flash available for user applications is reduced to one half. For

further information on C-API programming and OTAU, please refer to the ZWIR451x Programming Guide and the

ZWIR45xx Over-the-Air Update Manual.

2.4. Power Modes

The ZWIR4512 module provides a set of operating modes with different capabilities and power requirements.

This document only highlights the main features of these operating modes. Table 2.1 gives an overview of the

characteristics of the available power modes. See section 1.2.2 for a table of typical current consumption in the

different modes.

Refer to the ZWIR451x Programming Guide for detailed usage instructions for the low-power modes.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27

ZWIR4512AC1RA

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