cp3bt13 National Semiconductor Corporation, cp3bt13 Datasheet - Page 6

• Manufacturer Part Number: cp3bt13
• Description: Cp3bt13 Reprogrammable Connectivity Processor With Bluetooth-r And Can Interfaces
• Manufacturer: National Semiconductor Corporation

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uling upon reception. In addition, a time stamp counter (16-
bits wide) is provided to support real time applications.
The CAN module is a fast core bus peripheral, which allows
single cycle byte or word read/write access. A set of diag-
nostic features (such as loopback, listen only, and error
identification) support the development with the CAN mod-
ule and provide a sophisticated error management tool.
The CAN receiver can trigger a wake-up condition out of the
low-power modes through the Multi-Input Wake-Up module.
3.16
The ACCESS.bus interface module (ACB) is a two-wire se-
rial interface with the ACCESS.bus physical layer. It is also
compatible with Intel’s System Management Bus (SMBus)
and Philips’ I
a bus master or slave, and can maintain bidirectional com-
munications with both multiple master and slave devices.
The ACCESS.bus receiver can trigger a wake-up condition
out of the low-power modes using the Multi-Input Wake-Up
module.
3.17
The Direct Memory Access Controller (DMAC) can speed
up data transfer between memory and I/O devices or be-
tween two memories, relative to data transfers performed di-
rectly by the CPU. A method called cycle-stealing allows the
CPU and the DMAC to use the core bus in parallel. The
DMAC implements four independent DMA channels. DMA
requests from a primary and a secondary source are recog-
nized for each DMA channel, as well as a software DMA re-
quest issued directly by the CPU. Table 1 shows the DMA
channel assignment on the CP3BT13 architecture. The fol-
lowing on-chip modules can assert a DMA request to the
DMAC:
T CR16C (Software DMA request)
T UART
T Advanced Audio Interface
T CVSD/PCM Converter
Table 1 shows how the four DMA channels are assigned
to the modules listed above.
Channel
0
1
2
3
ACCESS.BUS INTERFACE
DMA CONTROLLER
Table 1 DMA Channel Assignment
Secondary
Secondary
Secondary
Secondary
Secondary
2
Primary/
C bus. The ACB module can be configured as
Primary
Primary
Primary
Primary
CVSD/PCM
CVSD/PCM
Peripheral
Reserved
Unused
UART
UART
AAI
AAI
Transaction
Read/Write
Read
Read
Read
Write
Write
Write
N/A
6
3.18
The audio interface provides a serial synchronous, full-du-
plex interface to CODECs and similar serial devices. Trans-
mit and receive paths operate asynchronously with respect
to each other. Each path uses three signals for communica-
tion: shift clock, frame synchronization, and data.
In case receive and transmit use separate shift clocks and
frame sync signals, the interface operates in its asynchro-
nous mode. Alternatively, the transmit and receive path can
share the same shift clock and frame sync signals for syn-
chronous mode operation.
The interface can handle data words of either 8- or 16-bit
length and data frames can consist of up to four slots.
In the normal mode of operation, the interface only transfers
one word at a periodic rate. In the network mode, the inter-
face transfers multiple words at a periodic rate. The periodic
rate is also called a data frame and each word within one
frame is called a slot. The beginning of each new data frame
is marked by the frame sync signal.
3.19
The CVSD/PCM module performs conversion between
CVSD data and PCM data, in which the CVSD encoding is
as defined in the Bluetooth specification 1.0 and the PCM
data can be 8-bit µ-Law, 8-bit A-Law, or 13-bit to 16-bit Lin-
ear.
3.20
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
four 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 into the on-chip Flash program memory using the
JTAG interface.
3.21
In addition to providing the features needed for the next gen-
eration of embedded Bluetooth products, the CP3BT13 is
backed up by the software resources designers need for
rapid time-to-market, including an operating system, Blue-
tooth protocol stack implementation, peripheral drivers, ref-
erence
environment. Combined with National’s LMX5252 Bluetooth
radio transceiver, the CP3BT13 provides a total Bluetooth
system solution.
National Semiconductor offers a complete and industry-
proven application development environment for CP3BT13
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.
ADVANCED AUDIO INTERFACE
CVSD/PCM CONVERSION MODULE
SERIAL DEBUG INTERFACE
DEVELOPMENT SUPPORT
designs,
and
an
integrated
development