NINA-W1 series - User Manual
1.2
CPU
NINA-W1 series modules use a dual-core system that includes two Harvard Architecture Xtensa LX6
CPUs with maximum 240 MHz internal clock frequency. The internal memory of NINA-W1 supports:
448 kB ROM for booting and core functions
520 kB SRAM for data and instruction
16 or 32 Mbit FLASH memory for code storage, including hardware encryption to protect
programs and data.
1 kbit EFUSE (non- erasable memory) for MAC addresses, module configuration, flash-
encryption, and Chip-ID.
Open CPU variants (NINA-W10) also support external FLASH and SRAM memory through a Quad SPI
interface.
1.3
Operating modes
1.3.1
Power modes
NINA-W1 series modules are power efficient devices capable of operating in different power saving
modes and configurations. Different sections of the modules can be powered off when they are not
needed, and complex wake up events can be generated from different external and internal inputs.
For the lowest current consumption modes an external LPO clock is required (interface available for
NINA-W10 series modules and NINA-W156).
1.4
Supply interfaces
1.4.1
Module supply design (VCC)
NINA-W1 series modules include an integrated Linear Voltage converter that transforms the supply
voltage. The output of the converter, presented at the
VCC
pin, provides a stable system voltage.
1.4.2
Digital I/O interfaces reference voltage (VCC_IO)
NINA-W1 series modules include an additional voltage supply input for setting the I/O voltage level.
A separate
VCC_IO
pin enables module integration in many applications with different voltage
supply levels (1.8 V or 3.3 V for example) without level converters. NINA-W1 series modules currently
support 3.3 V IO levels only.
1.4.3
VCC application circuits
The power for NINA-W1 series modules is applied through the VCC pins. These supplies are taken
from either of the following sources:
Switching Mode Power Supply (SMPS)
Low Drop Out (LDO) regulator
An SMPS is the ideal design choice when the available primary supply source is of a higher value
than the operating supply voltage of the module. This offers the best power efficiency for the
application design and minimizes the amount of current drawn from the main supply source.
