Silicon Laboratories Si475X Series Programming Manual

S i47 5 P
X ROGRAMMING
1. Introduction
This document provides an overview of the programming requirements for the Si475x-A10/A20/A30/A40/A55 and
Si475xC-A55 AM/FM receiver. The hardware control interface and software commands are detailed along with
several examples of the required steps to configure the device for various modes of operation. Table 1 provides a
programming guide cross-reference for each Si475x part released by Silicon Labs to date. This programming guide
focuses on the Si475x/5xC-A55 release; however, features, properties, ranges, and defaults that differ from the
Si475x-A10 to Si475x-A40 are noted as well. Refer to previous versions of this document for earlier firmware
revisions.
Part #
Si475x-A10
Si475x-A20
Si475x-A30
Si475x-A40
Si475x-A55
Si475xC-A55
2. Overview
This devices in this product family are programmed using commands and responses. To perform an action, the
system controller writes a command byte and associated arguments, which cause the device to execute the given
command. The device will, in turn, provide a response depending on the type of command that was sent.
The device has a slave control interface that allows the system controller to send commands to and receive
responses from the device using 2-wire mode (I
3. Terminology
CTS—Clear to send

STC—Seek/Tune Complete

NVM—Non-volatile internal device memory

Device—Refers to the AM/FM Receiver

System Controller—Refers to the system microcontroller

CMD—Command byte

ARGn—Argument byte (n = 1 to 7)

STATUS—Status byte

RESPn—Response byte (n = 1 to 15)

Rev. 0.9 10/16
Silicon Laboratories Confidential. Information contained herein is covered under non-disclosure agreement (NDA).
G
UIDE
Table 1. Si475x Firmware Revisions
Part Revision FMRX Component
1.0
2.0
3.0
4.0
5.5
5.5
2
C compatible).
Copyright © 2016 by Silicon Laboratories
AMRX Component
3.2.3
8.0.8
10.0.8
13.0.11 12.0.10
15.0.2 14.0.1
15.0.2 14.0.1
AN543
3.2.3
7.0.5
9.0.6
AN543