TNT4882 HS488 NAT4882 PD7210 TMS9914A JESD97 J-STD-033 J-STD-020C TNT4882-BQ - Datasheet Archive

 

NI TNT4882 · Built-in IEEE 488.1-compliant transceivers · 100-pin plastic quad flat pack (QFP), surface-mount

 

High-Performance Single-Chip GPIB Talker/Listener ASIC NI TNT4882 TNT4882 · Built-in IEEE 488.1-compliant transceivers · 100-pin plastic quad flat pack (QFP), surface-mount package · Single-chip ISA to GPIB solution · Fast data transfers · More than 1.5 MB/s (IEEE 488.1) · More than 8 MB/s (HS488 HS488) · Software compatible with the Turbo488/NAT4882 combination · Internal loop-back mode allows complete in-system functional testing · Meets all IEEE 488.2 requirements · Automatic EOS and/or new line message detection · DMA capable · Programmable timer interrupt for general-purpose timing · Reduces software overhead · Does not lose a data byte if ATN asserts during transmission · Static interrupt status bits do not clear when read · Automatically transmits END or performs RFD holdoff on last byte of DMA transfer · Interrupts when handshake is complete on last byte of a DMA transfer · 32-bit counter for large, uninterrupted data transfers · 32-byte FIFO buffers data between GPIB and CPU/DMA controller · Timer function for disciplined use of CPU bus bandwidth Overview HS488 HS488 The National Instruments TNT4882 TNT4882 is a single-chip IEEE 488.2 Talker/Listener interface to GPIB. The NI TNT4882 TNT4882 combines the circuitry of the NAT4882 NAT4882 IEEE 488.2 Controller ASIC, Turbo488 performanceenhancing ASIC, and GPIB transceivers to create a single-chip IEEE 488.2 interface. The TNT4882 TNT4882 contains a complete NAT4882 NAT4882, NEC µPD7210 PD7210, and Texas Instruments TMS9914A TMS9914A register set. Therefore, if you use any of these ASICs, you can port existing code directly to the TNT4882 TNT4882, significantly reducing software development time. The TNT4882 TNT4882 is ideal for use in all IEEE 488 instrument designs because of its compact size, surface-mount package, and performance enhancements that include HS488 HS488, a high-speed protocol for GPIB transfers. The HS488 HS488 protocol for GPIB transfers, adopted as part of ANSI/IEEE standard 488.1-2003, increases the maximum data transfer rate of IEEE 488.1-1987 up to 8 MB/s. Maximum data transfer rates obtainable using HS488 HS488 depend on the host architecture. The TNT4882 TNT4882 completely and transparently handles the HS488 HS488 protocol without additional circuitry. Because HS488 HS488 is a superset of the IEEE 488.1 standard, you can mix existing non HS488 HS488 GPIB devices with devices that are high-speed capable without changing your application programs. TNT 4882 ISA Pin Configuration Figure 1. ISA Pin Configuration TNT4882 TNT4882 Hardware Architecture and Modes The TNT4882 TNT4882 integrates the circuitry of the Turbo488, NAT4882 NAT4882, and IEEE 488.1-compliant transceivers (Figure 2). The TNT4882 TNT4882 circuitry logically interconnects these three components in one of two ways ­ two-chip or one-chip mode. The TNT4882 TNT4882 powers up in two-chip mode, which duplicates the Turbo488/NAT4882 chipset exactly for software compatibility. To achieve higher data transfer rates, you can switch the TNT4882 TNT4882 to one-chip mode in software. In one-chip mode, the FIFO connects directly to the GPIB transceivers, and the CPU accesses all registers directly. You can access NAT4882 NAT4882 registers in the same amount of time as Turbo488 registers. New software designs should be written using one-chip mode. The NAT4882 NAT4882 portion of the TNT4882 TNT4882 can emulate either the NEC µPD7210 PD7210 or the TI TMS9914A TMS9914A GPIB Controller ASICs. The state of one of the TNT4882 TNT4882 input pins determines the chip emulation mode on power-up, but you can switch emulation mode through software. High-Performance Single-Chip GPIB Talker/Listener ASIC RoHS Compliance GPIB CORE GPIB FIFO 9914/Turbo Registers Generic/ISA Port GPIB 4882 Registers 7210/Turbo Registers GPIB Transceivers Figure 2. TNT4882 TNT4882 Block Diagram The TNT4882 TNT4882 has two different pin configurations. The generic pin configuration provides a simple interface to any CPU (Figure 3). With the ISA pin configuration, you can connect the TNT4882 TNT4882 directly to an ISA bus without any external glue logic or data transceivers (Figure 1). You can also use the ISA pin configuration TNT4882 TNT4882 with an 8-bit ISA bus. You may want to use the ISA version for interfaces other than an ISA bus to take advantage of the built-in 5-bit address decoder. You can use two-chip mode or one-chip mode identically with either pin configuration. The TNT4882 TNT4882 is currently available from NI both in a standard package and as a RoHS-compliant chip. You can order the chips using the part numbers shown below. The RoHS-compliant parts are identified through the added "F" at the end of the part number and the chip itself is marked with an e3 inside an ellipse to indicate a pure tin lead finish in accordance with the marking recommendations defined in JEDEC JESD97 JESD97. The RoHS-compliant TNT4882 TNT4882 ASICs have a matte pure tin finish on their leads. The RoHS-compliant TNT4882 TNT4882 meets industry requirements for baking and maximum solder reflow temperature. The baking requirements are outlined in JEDEC J-STD-033 J-STD-033, and NI recommends using the solder reflow profile as shown in IPC/JEDEC J-STD-020C J-STD-020C with a peak temperature of 260 °C, the maximum temperature they can withstand. The Moisture Sensitivity Level (MSL) for the RoHS-compliant surface mount TNT4882 TNT4882 ASIC is 3. TNT 4882 Generic Pin Configuration Ordering Information Figure 3. Generic Mode Pin Configuration TNT4882 TNT4882 Developer Kit To assist in the TNT4882 TNT4882 hardware design and software implementation, a special developer kit is available. This kit contains two TNT4882 TNT4882 ASICs, a TNT4882 TNT4882 ISA evaluation board, a high-performance NI-Device DDK (driver development kit), source code, and software and hardware reference manuals. This kit is available to all interested developers who want to use the TNT4882 TNT4882 in their designs. NI TNT4882-BQ TNT4882-BQ RoHS-compliant .TNT4882-BQF66 TNT4882-BQF66 Standard .TNT4882-BQ66 TNT4882-BQ66 Developer kit (RoHS-compliant) .776866-01 Sample kit (RoHS-compliant, 5 ASICs) .778609-01 Visit ni.com for a more detailed reference manual and data sheet. BUY NOW! For complete product specifications, pricing, and accessory information, call (800) 813 3693 (U.S.) or go to ni.com/gpib. BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.) 2 NI Services and Support SERVICE NEEDS NI has the services and support to meet your needs around the globe and through the application life cycle ­ from planning and development through deployment and ongoing maintenance. We offer services and service levels to meet customer requirements in research, design, validation, and manufacturing. Visit ni.com/services. 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National Instruments, National Instruments Alliance Partner, NI, ni.com, SCXI and TNT4882 TNT4882 are trademarks of National Instruments. Other product and company names listed are trademarks or trade names of their respective companies. A National Instruments Alliance Partner is a business entity independent from NI and has no agency, partnership, or joint-venture relationship with NI. 2006-7906-385-101-D 2006-7906-385-101-D