The security functions of the CC3135 chip which is inside the CC3135MOD module, are FIPS certified to FIPS
140-2 level 1. This certification covers topics such as: cryptographic specifications, ports and interfaces, a finite
state model for the cryptographic functions, the operational environment of the function, and how cryptographic
keys are managed. The certification provides the assurance that the implementation meets FIPS 140-2 level 1
standards.
9.2.4 Host Interface and Driver
• Interfaces over a 4-wire SPI with any MCU or a processor at a clock speed of 20 MHz
• Interfaces over UART with any MCU with a baud rate up to 3 Mbps. A low footprint driver is provided for TI
MCUs and is easily ported to any processor or ASIC.
• Simple APIs enable easy integration with any single-threaded or multithreaded application.
9.2.5 System
• Connects directly to a battery
• Ultra-low leakage when disabled (hibernate mode) with a current of less than 5.5 µA with the RTC running
and 1 µA when in shutdown mode.
• Integrated clock sources
9.3 Power-Management Subsystem
The CC3135MOD power-management subsystem contains DC-DC converters to accommodate the differing
voltage or current requirements of the system.
The CC3135MOD is a fully integrated module-based WLAN radio solution used on an embedded system with a
wide-voltage supply range. The internal power management, including DC-DC converters and LDOs, generates
all of the voltages required for the module to operate from a wide variety of input sources. For maximum
flexibility, the module can operate in the modes described in the following sections.
9.3.1 V
BAT
Wide-Voltage Connection
In the wide-voltage battery connection, the module can be directly connected to two AA alkaline batteries. All
other voltages required to operate the device are generated internally by the DC-DC converters. This scheme is
the most common mode for the device because it supports wide-voltage operation from 2.3 to 3.6 V.
9.4 Low-Power Operating Modes
This section describes the low-power modes supported by the module to optimize battery life.
9.4.1 Low-Power Deep Sleep
The low-power deep-sleep (LPDS) mode is an energy-efficient and transparent sleep mode that is entered
automatically during periods of inactivity based on internal power optimization algorithms. The module can wake
up in less than 3 ms from the internal timer or from any incoming host command. Typical battery drain in this
mode is 135 µA. During LPDS mode, the module retains the software state and certain configuration information.
The operation is transparent to the external host; thus, no additional handshake is required to enter or exit this
sleep mode.
9.4.2 Hibernate
The hibernate mode is the lowest power mode in which all of the digital logic is power-gated. Only a small
section of the logic powered directly by the main input supply is retained. The real-time clock (RTC) is kept
running and the module wakes up when the n_HIB line is asserted by the host driver. The typical battery drain in
this mode is 5.5 µA. The wake-up time is longer than LPDS mode at about 50 ms.
9.4.3 Shutdown
Shutdown mode is the lowest power-mode system-wise. All device logics are off, including the realtime clock
(RTC). The typical battery drain in this mode is 1 µA. The wake-up time in this mode is longer than hibernate at
approximately 1.1 seconds.
SWRS225D – FEBRUARY 2019 – REVISED MAY 2021
Copyright © 2021 Texas Instruments Incorporated
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