CC112X

MARC

Main Radio Control Unit

Ultra low power 16 bit

MCU

256 byte

FIFO RAM

buffer

4k byte

ROM

RF and DSP frontend

Packet handler

and FIFO control

Configuration and

status registers

eWOR

Enhanced ultra low power

Wake On Radio timer

SPI

Serial configuration

and data interface

Interrupt and

IO handler

System bus

PA

LNA_P

LNA_N

90dB dynamic

range ADC

90dB dynamic

range ADC

High linearity

LNA

14dBm high

efficiency PA

XOSC

AGC

Automatic Gain Control, 60dB VGA range

RSSI measurements and carrier sense detection

Highly flexible FSK / OOK

demodulator

(optional bit clock)

(optional low jitter serial

data output for legacy

protocols)

Data interface with

signal chain access

XOSC_Q1

XOSC_Q2

Ultra low power 32kHz

auto-calibrated RC oscillator

(optional 32kHz

clock intput)

CSn (chip select)

SI (serial input)

SO (serial output)

SCLK (serial clock)

(optional GPIO0-3)

Fully integrated Fractional-N

Frequency Synthesizer

Output power ramping and OOK / ASK modulation

ifamp

ifamp

(optional autodetected

external XOSC / TCXO)

(optional GPIO for

antenna diversity)

I

Q

Battery sensor /

temp sensor

Power on reset

CC1121

SWRS111F – JUNE 2011 – REVISED OCTOBER 2014

www.ti.com

1.3

Description

The CC1121 device is a fully integrated single-chip radio transceiver designed for high performance at

very low-power and low-voltage operation in cost-effective wireless systems. All filters are integrated, thus

removing the need for costly external SAW and IF filters. The device is mainly intended for the ISM

(Industrial, Scientific, and Medical) and SRD (Short Range Device) frequency bands at 274–320 MHz,

410–480 MHz, and 820–960 MHz.

The CC1121 device provides extensive hardware support for packet handling, data buffering, burst

transmissions, clear channel assessment, link quality indication, and Wake-On-Radio. The main operating

parameters of the CC1121 device can be controlled through an SPI interface. In a typical system, the

CC1121 device will be used with a microcontroller and only a few external passive components.

PART NUMBER

PACKAGE

BODY SIZE

CC1121RHB

VQFN (32)

5.00 mm x 5.00 mm

(1)

For more information, see Section 8, Mechanical Packaging and Orderable Information

1.4

Functional Diagram

Figure 1-1 shows the system block diagram of the CC1121 device.

Figure 1-1. Functional Block Diagram

2

Device Overview

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