Data Sheet, Rev. 2
October 2001
FW323 05
1394A PCI PHY/Link Open Host Controller Interface
Features
I
1394a-2000 OHCI link and PHY core function in sin-
gle device:
— Enables smaller, simpler, more efficient mother-
board and add-in card designs by replacing two
components with one
— Enables lower system costs
— Leverages proven 1394a-2000 PHY core design
— Demonstrated compatibility with current Microsoft
Windows
drivers and common applications
— Demonstrated interoperability with existing, as well
as older, 1394 consumer electronics and periph-
erals products
— Feature-rich implementation for high performance
in common applications
— Supports low-power system designs (CMOS
implementation, power management features)
— Provides LPS, LKON, and CNA outputs to support
legacy power management implementations
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OHCI:
— Complies with OHCI 1.1 WHQL requirements
— Complies with Microsoft Windows Logo Program
System and Device Requirements
— Listed on Windows Hardware Compatibility List
http://www.microsoft.com/hcl/results.asp
— Compatible with Microsoft Windows and MacOS
operating systems
— 4 Kbyte isochronous transmit FIFO
— 2 Kbyte asynchronous transmit FIFO
— 4 Kbyte isochronous receive FIFO
— 2 Kbyte asychronous receive FIFO
— Dedicated asynchronous and isochronous
descriptor-based DMA engines
— Eight isochronous transmit contexts
— Eight isochronous receive contexts
— Prefetches isochronous transmit data
— Supports posted write transactions
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1394a-2000 PHY core:
— Compliant with IEEE
1394a-2000, Standard for a
High Performance Serial Bus (Supplement)
— Provides three fully compliant cable ports, each
supporting 400 Mbits/s, 200 Mbits/s, and
100 Mbits/s traffic
— Supports extended BIAS_HANDSHAKE time for
enhanced interoperability with camcorders
— While unpowered and connected to the bus, will
not drive TPBIAS on a connected port even if
receiving incoming bias voltage on that port
— Does not require external filter capacitor for PLL
— Supports PHY core-link interface initialization and
reset
— Supports link-on as a part of the internal
PHY core-link interface
— 25 MHz crystal oscillator and internal PLL provide
transmit/receive data at 100 Mbits/s, 200 Mbits/s,
and 400 Mbits/s, and internal link-layer controller
clock at 50 MHz
— Interoperable across 1394 cable with 1394 phys-
ical layers (PHY core) using 5 V supplies
— Node power-class information signaling for
system power management
— Supports ack-accelerated arbitration and fly-by
concatenation
— Supports arbitrated short bus reset to improve
utilization of the bus
— Fully supports suspend/resume
— Supports connection debounce
— Supports multispeed packet concatenation
— Supports PHY pinging and remote PHY access
packets
— Reports cable power fail interrupt when voltage at
CPS pin falls below 7.5 V
— Separate cable bias and driver termination voltage
supply for each port
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Link:
— Cycle master and isochronous resource manager
capable
— Supports 1394a-2000 acceleration features