National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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or system whose failure to perform can be reasonably expected

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Leadfree products are RoHS compliant.

In addition, the Clock and Reset module generates the de-

vice reset by using reset input signals coming from an exter-

nal reset, the watchdog timer, or the SDI debugging

interface. A power-on reset (POR) circuit eliminates the

need for an external RC network. The POR circuit gener-

ates an internal reset of sufficient length if the power supply

rise time specification is met.

3.24

DMA CONTROLLER

The Direct Memory Access Controller (DMAC) can speed

up data transfer between memory and I/O devices or be-

tween two regions of memory, as compared to data trans-

fers performed directly by the CPU. Cycle stealing allows

the CPU and the DMAC to interleave access to the CPU

core bus for greater utilization of the available bandwidth.

The following on-chip modules can assert a DMA request to

the DMA controller:

•

USART 0 (2 request channels)

•

UART 1/2/3 (6 request channels)

•

Advanced Audio Interface (6 request channels)

•

CVSD/PCM Converter 0/1 (8 request channels)

•

Microwire/SPI 0/1 (4 request channels)

•

ACCESS.bus 0/1 (2 request channels)

•

Codec (4 request channels)

The DSP has its own DMA controller which can be config-

ured to accept DMA requests from peripherals on the

shared audio peripheral APB bus. The USB controller also

has its own DMA controller, which operates on the CPU

core bus.

3.25

SERIAL DEBUG INTERFACE

The Serial Debug Interface module (SDI module) provides

a JTAG-based serial link to an external debugger, for exam-

ple running on a PC. In addition, the SDI module integrates

an on-chip debug module, which allows the user to set up to

eight hardware breakpoints on instruction execution and

data transfer. The SDI module can act as a CPU bus master

to access all memory-mapped resources, such as RAM and

peripherals. Therefore it also allows for fast program code

download using the JTAG interface.

3.26

DEVELOPMENT SUPPORT

In addition to providing the features needed for the next gen-

eration of embedded Bluetooth products, the CP3SP33 de-

vices are backed up by the software resources that

designers need for rapid product development, including an

operating system, Bluetooth protocol stack implementation,

peripheral drivers, reference designs, and an integrated de-

velopment

environment.

Combined

with

National’s

LMX5251 Bluetooth radio transceiver, the CP3SP33 devic-

es provide a total Bluetooth system solution.

National Semiconductor offers a complete and industry-

proven application development environment for CP3SP33

applications, including the IAR Embedded Workbench,

iSYSTEM winIDEA and iC3000 Active Emulator, Bluetooth

Development Board, Bluetooth Protocol Stack, and Applica-

tion Software. See your National Semiconductor sales rep-

resentative for current information on availability and

features of emulation equipment and evaluation boards.