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TIBPAL20R4-10C Datasheet(PDF) 11 Page - Texas Instruments |
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TIBPAL20R4-10C Datasheet(HTML) 11 Page - Texas Instruments |
11 / 24 page TIBPAL20L8-10C, TIBPAL20R4-10C, TIBPAL20R6-10C, TIBPAL20R8-10C HIGH-PERFORMANCE IMPACT-X ™ PAL® CIRCUITS SRPS008A – D3336, OCTOBER 1989 – REVISED MARCH 1992 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 programming information Texas Instruments programmable logic devices can be programmed using widely available software and inexpensive device programmers. Complete programming specifications, algorithms, and the latest information on hardware, software, and firmware are available upon request. Information on programmers capable of programming Texas Instruments programmable logic is also available, upon request, from the nearest TI field sales office, local authorized TI distributor, or by calling Texas Instruments at (214) 997-5666. preload procedure for registered outputs (see Figure 1 and Note 3) The output registers can be preloaded to any desired state during device testing. This permits any state to be tested without having to step through the entire state-machine sequence. Each register is preloaded individually by following the steps given below. Step 1. With VCC at 5 volts and Pin 1 at VIL, raise Pin 13 to VIHH. Step 2. Apply either VIL or VIH to the output corresponding to the register to be preloaded. Step 3. Pulse Pin 1, clocking in preload data. Step 4. Remove output voltage, then lower Pin 13 to VIL. Preload can be verified by observing the voltage level at the output pin. td tsu tw td VIHH VIL VIL VOL VOH VIH Pin 13 Pin 1 Registered I/O Input Output VIH VIL Figure 1. Preload Waveforms NOTE 3: td = tsu = th = 100 ns to 1000 ns VIHH = 10.25 V to 10.75 v |
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