TIBPAL16L8-15C_15 Datasheet, PDF (13/24 Pages) Texas Instruments – HIGH-PERFFORMANCE IMPACT

TIBPAL16R6-20M and TIBPAL16R8-20M are Not Recommended for New Designs
TIBPAL 16L8-15C, TIBPAL 16R4-15C, TIBPAL 16R6-15C, TIBPAL 16R8-15C
TIBPAL 16L8-20M, TIBPAL 16R4-20M, TIBPAL 16R6-20M, TIBPAL 16R8-20M
HIGH-PERFORMANCE IMPACT ™ PAL® CIRCUITS
SRPS019A – FEBRUARY 1984 – REVISED APRIL 2000
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 also is available, upon request, from the nearest TI field sales office or local authorized TI
distributor, by calling Texas Instruments at +1 (972) 644–5580, or by visiting the TI Semiconductor Home Page
at www.ti.com/sc.
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.
Step 2.
Step 3.
Step 4.
With V_CC at 5 V and Pin 1 at V_IL, raise Pin 11 to V_IHH.
Apply either V_IL or V_IH to the output corresponding to the register to be preloaded.
Pulse Pin 1, clocking in preload data.
Remove output voltage, then lower Pin 11 to V_IL. Preload can be verified by observing the
voltage level at the output pin.
Pin 11
Pin 1
tsu
td
td
tw
VIHH
VIL
VIH
VIL
Registered I/O
VIH
Input
VIL
NOTE 3: td = tsu = th = 100 ns to 1000 ns VIHH = 10.25 V to 10.75 V
Figure 1. Preload Waveforms
Output
VOH
VOL
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