IEEE 488.2 Controller Chip
The NAT9914 IEEE 488.2 controller chip can perform all the
interface functions deï¬ned by the IEEE Standard 488.1-1987,and
also meets the additional requirements and recommendations
of the IEEE Standard 488.2-1987. Connected between the
processor and the IEEE 488 bus, the NAT9914 provides highlevel management of the IEEE 488 bus, signiï¬cantly increases
the throughput of driver software, and simplifies both the
hardware and software design. The NAT9914 performs
complete IEEE 488 Talker, Listener, and Controller functions. In
addition to its numerous improvements, the NAT9914 is also
completely pin compatible with the TI TMS 9914A and
software compatible with the NEC µPD7210 and TI TMS9914A
Pin compatible with TI TMS9914A
Software compatible with NEC µPD7210 or TI TMS9914A controller chips
Low power consumption
Meets all IEEE 488.2 requirements
Bus line monitoring
Preferred implementation of requesting service
Will not send messages when there are no Listeners
Performs all IEEE 488.1 interface functions
Programmable data transfer rate
(T1 delays of 350 ns, 500 ns,
1.1 µs, and 2 µs)
Automatic EOS and/or NL message detection
Direct memory access (DMA)
Automatically processes IEEE 488 commands and reads
TTL-compatible CMOS device
Programmable clock rate
20 MHz maximum
Reduces driver overhead
Does not lose a data byte if ATN is asserted while transmitting data
new and original stock
Warranty :180 days !
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