SN74ACT8990 masters equivalent, ieee std 1149.1 (jtag) tap masters.
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SCOPE and EP.
The ’ACT8990 test-bus controllers (TBC) are members of the Texas Instruments SCOPE™ testability integrated-circuit family. This family of components supports IEEE Standard 1149.1-1990 (JTAG) boundary scan to facilitate testing of complex circuit-boar.
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