BCM43903 Datasheet, PDF (12/87 Pages) Cypress Semiconductor – WICED™ IEEE 802.11 b/g/n SoC with an Embedded Applications Processor

BCM43903 Preliminary Data Sheet
Section 1: Overview
Overview
Introduction
The Broadcom Ltd. BCM43903 is a single-chip device that provides the highest level of integration for an
embedded system-on-a-chip with integrated IEEE 802.11 b/g/n MAC/baseband/radio and a separate ARM
Cortex-R4 applications processor. It provides a small form-factor solution with minimal external components to
drive down cost for mass volumes and allows for an embedded system with flexibility in size, form, and function.
Comprehensive power management circuitry and software ensure that the system can meet the needs of highly
embedded systems that require minimal power consumption and reliable operation.
Figure 2 shows the interconnect of all the major physical blocks in the BCM43903 and their associated external
interfaces, which are described in greater detail in Section 5: “Applications Subsystem External Interfaces,” on
page 26.
Figure 2: Block Diagram and I/O
SPI Flash
GPIO[16:0]
2x 2-Wire UART
4-Wire UART
SPI/BSC
BSC
JTAG/SWD
WAKE
BCM43903
APPS Subsystem
WLAN Subsystem
RF TX
RF RX
ARM Cortex-R4
320 MHz
32 KB I-cache
32 KB D-cache
1 MB SRAM
640 KB ROM
ARM Cortex-R4
160 MHz
448 KB ROM TCM
576 KB SRAM TCM
802.11n
1x1
2.4 GHz
Switch Control
Antenna Diversity
VDDIOs
GND
Note: Another SPI interface can be defined by reconfiguring GPIO_8 through GPIO_11 and another
BSC interface can be defined by reconfiguring GPIO_12 and GPIO_13 (see Table 10: “Pin
Multiplexing,” on page 52).
Broadcom^®
March 12, 2016 • 43903-DS102-R
BROADCOM CONFIDENTIAL
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