SX1441EVK Semtech, SX1441EVK Datasheet - Page 10

• Manufacturer Part Number: SX1441EVK
• Description: KIT DEV FOR SX1441
• Manufacturer: Semtech
• Series: EasyBlue™r
• Type: Bluetoothr

Specifications of SX1441EVK

• For Use With/related Products: SX1441
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Contents: -
• Other names: SX1441DVK; SX1441DVK

Data Sheet
SX1441 – Bluetooth® 1.2 SoC
Personal Area Network
®
A high-level block diagram of the SX1441 is shown in Figure 3. The CoolRISC
816 8-bit RISC processor is
optimized for both computation power and energy consumption efficiency. Every instruction executes in one clock
cycle. The system frequency can be selected from different possible clock signals. SLW_CLOCK_IN, which is
typically 32 kHz, SYS_CLOCK_IN, which is typically 13 MHz, or the internal programmable RC oscillator f
up to
RC
15 MHz. The program memory consists of; firstly 4k instructions in ROM for the boot code and the debug drivers,
and then 40k instructions in RAM dedicated to the application and the upper layers of the Bluetooth protocol stack.
The data memory is 8 kbyte RAM. The interrupt and event controllers manage interrupts and events from
peripherals and internal timers. The reset controller takes care of the power-on phase. The clock controller selects
the processor and peripherals clocks between the internal RC oscillator or the two external clocks.
GPIO’s are split into two peripherals: a) port A (PA) is an 8-bit wide input digital port with selectable pull-up and
debouncer, which can also be programmed to generate interrupts and resets; and b) port B (PB), an 8-bit wide
input/output digital port with selectable pull-up and open-drain capabilities.
The SPI and UART interfaces implement serial communication protocols. The SPI can communicate with up to 5
peripherals, one of them being the serial non-volatile memory storing the application code. The UART has an 8-
byte FIFO and supports hardware flow control.
The integrated power management unit generates the regulated supply voltages for the SX1441, thus reducing the
number of external components. It also monitors the battery voltage to detect the end-of-life of the battery.
The CODEC is compliant with the Bluetooth audio specifications and integrates a built-in CVSD coder/decoder.
The audio samples are transferred directly from the Bluetooth sequencer to the CODEC to reduce the processor
load and power consumption. A DMA interface allows transferring of samples directly between the memory and the
CODEC.
The Bluetooth sequencer is a complete dedicated Bluetooth co-processor. It implements the lower layers of the
Bluetooth protocol stack from the radio interface up to the HCI. It runs independently from the processor and
communicates with it through a dedicated internal UART link. This massively simplifies the debugging of the final
product and the Bluetooth qualification process since the application cannot disturb the time-critical part of the
Bluetooth stack. The Bluetooth sequencer supports all modes of operation (Active, Hold, Sniff, Park, Standby), all
packet types, simultaneous operation with up to 7 ACL (data) links and one SCO (audio) link in a point-to-point,
piconet, or scatternet network configuration.
The debug-on-chip (DoC) peripheral interfaces the chip with the software debugger.
© Semtech 2006
www.semtech.com
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