Alliance's AS91L1006BU is a one to six-port IEEE1149.1 JTAG gateway. It partitions a single IEEE1149.1 JTAG chain into six separate chains. These separate chains can be optionally configured to operate as a single chain.
The AS91L1006BU provides the capability of partitioning the PCB into multiple smaller IEEE1149.1 JTAG scan chains that are totally under software control. Partitioning the IEEE1149.1 JTAG chains on the PCB has several benefits, including easier fault diagnostics capabilities as a fault on one of the IEEE1149.1
JTAG Local Scan Ports (LSPs) does not render the PCB untestable, faster Flash programming on the PCBs, and removal of IEEE1149.1 JTAG signal loading issues.
The AS91L1006BU enables the IEEE1149.1 JTAG interface to be used in a true multi-drop environment without any additional signals. This multi-drop capability enables the standard IEEE1149.1 JTAG interface to be used not just for stand-alone PCB testing, but also for complete system testing including all PCBs within a system back plane environment.
All of the protocols required for addressing the AS91L1006BU device via the
multi-drop capability and the protocols for configuring which of the six IEEE1149.1 LSPs on the AS91L1006BU is to be used, are handled via 3 rd party ATPG tools from vendors like Asset-Intertech and JTAG Technologies.
Features:
- Support for 6 local scan chains addressable via the IEEE1149.1 JTAG interface
- Device multi-drop addressable via the IEEE1149.1 JTAG protocol
- Support for Pass-through ä mode
- Support for status instruction enabling non-intrusive monitoring of the system card
- Local Scan Port (LSP) enable signal provides the ability to use non IEEE1149.1 JTAG compliant devices that require the JTAG enable signal
- Provides the ability to initiate self test on a remote PCB via a standard IEEE1149.1 JTAG command
- Support for JTAG Technologies AutoWR ä feature, which enables faster Flash programming
- Pinout and feature set compatible (complete second source) with the Firecron JTS06B device
- Available in a 100-pin LQFP lead-free package or a 100-pin FPBGA green package
- 3.3V Core and IO
- 5V Tolerant IOs
Applications:
- Enterprise LAN switches
- Storage systems and switches (SAN, NAS, RAID, FC)
- Firewalls, VPN and security gateways
- High-end computing systems
- Servers and server clusters
- Printing, graphics, and imaging Systems
- Edge, access routers and MAN switches
- Wireless gateways
- Voice and multimedia access gateways
- Multi-service access concentrators
- Test equipment with network probes
Device Block Diagram: 
System Block Diagram: 
Products:
AS91L1006BU-10L100-C
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- BU = 8-bit user code
- 100-Pin LQFP Package
- Commercial Temperature: 0 to 70 degrees C.
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AS91L1006BU-10L100-I |
- BU = 8-bit user code
- 100-Pin LQFP Package
- Industrial Temperature: -40 to 85 degrees C.
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