ADSP-BF537 AD [Analog Devices], ADSP-BF537 Datasheet - Page 11

• Manufacturer Part Number: ADSP-BF537
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

In conjunction with the general-purpose timer functions, auto-
baud detection is supported.
The capabilities of the UARTs are further extended with sup-
port for the infrared data association (IrDA) serial infrared
physical layer link specification (SIR) protocol.
CONTROLLER AREA NETWORK (CAN)
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors offer
a CAN controller that is a communication controller imple-
menting the CAN 2.0B (active) protocol. This protocol is an
asynchronous communications protocol used in both industrial
and automotive control systems. The CAN protocol is well-
suited for control applications due to its capability to communi-
cate reliably over a network, since the protocol incorporates
CRC checking message error tracking, and fault node
confinement.
The CAN controller offers the following features:
The electrical characteristics of each network connection are
very demanding so the CAN interface is typically divided into
two parts: a controller and a transceiver. This allows a single
controller to support different drivers and CAN networks. The
CAN module represents only the controller part of the interface.
The controller interface supports connection to 3.3 V high-
speed, fault-tolerant, single-wire transceivers.
TWI CONTROLLER INTERFACE
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors
include a 2-wire interface (TWI) module for providing a simple
exchange method of control data between multiple devices. The
TWI is compatible with the widely used I
TWI module offers the capabilities of simultaneous master and
slave operation, support for both 7-bit addressing and multime-
dia data arbitration. The TWI interface utilizes two pins for
transferring clock (SCL) and data (SDA) and supports the
protocol at speeds up to 400k bits/sec. The TWI interface pins
are compatible with 5 V logic levels.
Additionally, the processor’s TWI module is fully compatible
with serial camera control bus (SCCB) functionality for easier
control of various CMOS camera sensor devices.
• 32 mailboxes (eight receive only, eight transmit only, 16
• Dedicated acceptance masks for each mailbox.
• Additional data filtering on first two bytes.
• Support for both the standard (11-bit) and extended
• Support for remote frames.
• Active or passive network support.
• CAN wakeup from hibernation mode (lowest static power
• Interrupts, including: Tx complete, Rx complete, error,
configurable for receive or transmit).
(29-bit) identifier (ID) message formats.
consumption mode).
global.
2
C
®
bus standard. The
Rev. B | Page 11 of 68 | July 2006
10/100 ETHERNET MAC
The ADSP-BF536 and ADSP-BF537 processors offer the capa-
bility to directly connect to a network by way of an embedded
Fast Ethernet Media Access Controller (MAC) that supports
both 10-BaseT (10M bits/sec) and 100-BaseT (100M bits/sec)
operation. The 10/100 Ethernet MAC peripheral is fully compli-
ant to the IEEE 802.3-2002 standard, and it provides
programmable features designed to minimize supervision, bus
use, or message processing by the rest of the processor system.
Some standard features are:
Some advanced features are:
ADSP-BF534/ADSP-BF536/ADSP-BF537
• Support of MII and RMII protocols for external PHYs.
• Full duplex and half duplex modes.
• Data framing and encapsulation: generation and detection
• Media access management (in half-duplex operation): col-
• Flow control (in full-duplex operation): generation and
• Station management: generation of MDC/MDIO frames
• SCLK operating range down to 25 MHz (active and sleep
• Internal loopback from Tx to Rx.
• Buffered crystal output to external PHY for support of a
• Automatic checksum computation of IP header and IP
• Independent 32-bit descriptor-driven Rx and Tx DMA
• Frame status delivery to memory via DMA, including
• Tx DMA support for separate descriptors for MAC header
• Convenient frame alignment modes support even 32-bit
• Programmable Ethernet event interrupt supports any com-
• 47 MAC management statistics counters with selectable
of preamble, length padding, and FCS.
lision and contention handling, including control of
retransmission of collision frames and of back-off timing.
detection of PAUSE frames.
for read-write access to PHY registers.
operating modes).
single crystal system.
payload fields of Rx frames.
channels.
frame completion semaphores, for efficient buffer queue
management in software.
and payload to eliminate buffer copy operations.
alignment of encapsulated Rx or Tx IP packet data in mem-
ory after the 14-byte MAC header.
bination of:
clear-on-read behavior and programmable interrupts on
half maximum value.
• Any selected Rx or Tx frame status conditions.
• PHY interrupt condition.
• Wakeup frame detected.
• Any selected MAC management counter(s) at
• DMA descriptor error.
half-full.