ADSP-2195MBCA-140 Analog Devices Inc, ADSP-2195MBCA-140 Datasheet - Page 11

• Manufacturer Part Number: ADSP-2195MBCA-140
• Description: IC DSP CONTROLLER 16BIT 144MBGA
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-2195MBCA-140

• Rohs Status: RoHS non-compliant
• Interface: Host Interface, SPI, SSP, UART
• Clock Rate: 140MHz
• Non-volatile Memory: ROM (48 kB)
• On-chip Ram: 80kB
• Voltage - I/o: 3.30V
• Voltage - Core: 2.50V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 144-MBGA, 144-Mini-BGA

The functional modes selected by HPCR [7:6] are as follows
(assuming active high signal):
• ACK Mode—Acknowledge is active on strobes; HACK
• Ready Mode—Ready active on strobes, goes low to insert
While in Address Cycle Control (ACC) mode and the ACK
or Ready acknowledge modes, the HACK is returned active
for any address cycle.
Host Port Chip Selects
There are two chip-select signals associated with the Host
Port: HCMS and HCIOMS. The Host Chip Memory
Select (HCMS) lets the Host select the DSP and directly
access the DSP’s internal/external memory space or boot
memory space. The Host Chip I/O Memory Select
(HCIOMS) lets the Host select the DSP and directly access
the DSP’s internal I/O memory space.
Before starting a direct access, the Host configures Host
port interface registers, specifying the width of external data
bus (8- or 16-bit) and the target address page (in the IJPG
register). The DSP generates the needed memory select
signals during the access, based on the target address. The
Host port interface combines the data from one, two, or
three consecutive Host accesses (up to one 24-bit value) into
a single DMA bus access to prefetch Host direct reads or to
post direct writes. During assembly of larger words, the Host
port interface asserts ACK for each byte access that does
not start a read or complete a write. Otherwise, the Host
port interface asserts ACK when it has completed the
memory access successfully.
DSP Serial Ports (SPORTs)
The ADSP-2195 incorporates three complete synchronous
serial ports (SPORT0, SPORT1, and SPORT2) for serial
and multiprocessor communications. The SPORTs
support the following features:
• Bidirectional operation—each SPORT has independent
• Buffered (8-deep) transmit and receive ports—each port
• Clocking—each transmit and receive port can either use
REV. PrA
September 2001
goes high from the leading edge of the strobe to indicate
when the access can complete. After the Host samples the
HACK active, it can complete the access by removing the
strobe.The host port then removes the HACK.
wait state during the access.If the host port can not
complete the access, it de-asserts the HACK/READY
line. In this case, the Host has to extend the access by
keeping the strobe asserted. When the Host samples the
HACK asserted, it can then proceed and complete the
access by de-asserting the strobe.
transmit and receive pins.
has a data register for transferring data words to and from
other DSP components and shift registers for shifting data
in and out of the data registers.
an external serial clock ( 75 MHz) or generate its own,
in frequencies ranging from 1144 Hz to 75 MHz.
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
For current information contact Analog Devices at 800/262-5643
• Word length—each SPORT supports serial data words
• Framing—each transmit and receive port can run with or
• Companding in hardware—each SPORT can perform
• DMA operations with single-cycle overhead—each
• Interrupts—each transmit and receive port generates an
• Multichannel capability—each SPORT supports the
Serial Peripheral Interface (SPI) Ports
The DSP has two SPI-compatible ports that enable the DSP
to communicate with multiple SPI-compatible devices.
These ports are multiplexed with SPORT2, so either
SPORT2 or the SPI ports are active, depending on the state
of the OPMODE pin during hardware reset.
The SPI interface uses three pins for transferring data: two
data pins (Master Output-Slave Input, MOSIx, and Master
Input-Slave Output, MISOx) and a clock pin (Serial Clock,
SCKx). Two SPI chip select input pins (SPISSx) let other
SPI devices select the DSP, and fourteen SPI chip select
output pins (SPIxSEL7–1) let the DSP select other SPI
devices. The SPI select pins are reconfigured Programmable
Flag pins. Using these pins, the SPI ports provide a full
duplex, synchronous serial interface, which supports both
master and slave modes and multimaster environments.
Each SPI port’s baud rate and clock phase/polarities are
programmable (see
DMA controller, configurable to support both transmit and
receive data streams. The SPI’s DMA controller can only
service unidirectional accesses at any given time.
Figure 4. SPI Clock Rate Calculation
from 3 to 16 bits in length transferred in Big Endian
(MSB) or Little Endian (LSB) format.
without frame sync signals for each data word. Frame sync
signals can be generated internally or externally, active
high or low, and with either of two pulsewidths and early
or late frame sync.
A-law or µ-law companding according to ITU recommen-
dation G.711. Companding can be selected on the
transmit and/or receive channel of the SPORT without
additional latencies.
SPORT can automatically receive and transmit multiple
buffers of memory data, one data word each DSP cycle.
Either the DSP’s core or a Host processor can link or chain
sequences of DMA transfers between a SPORT and
memory. The chained DMA can be dynamically allocated
and updated through the DMA descriptors (DMA
transfer parameters) that set up the chain.
interrupt upon completing the transfer of a data word or
after transferring an entire data buffer or buffers through
DMA.
H.100 standard.
SPI Clock Rate
Figure
=
--------------------------------------
2 SPIBAUD
4), and each has an integrated
HCLK
ADSP-2195
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