atf750c-15xc ATMEL Corporation, atf750c-15xc Datasheet - Page 13

• Manufacturer Part Number: atf750c-15xc
• Description: Atf750c High-speed Complex Programmable Logic Device
• Manufacturer: ATMEL Corporation

Preload of Registered
Outputs
0776K–PLD–07/07
The ATF750C(L)’s registers are provided with circuitry to allow loading of each register
asynchronously with either a high or a low. This feature will simplify testing since any
state can be forced into the registers to control test sequencing. A V
pin will force the register high; a V
The PRELOAD state is entered by placing a 10.25V to 10.75V signal on pin 8 on DIPs,
and lead 10 on SMDs. When the clock term is pulsed high, the data on the I/O pins is
placed into the register chosen by the select pin
.
Output Pin during Preload Cycle
Level Forced on Registered
V
V
V
V
IH
IH
IL
IL
IL
will force it low, independent of the output polarity.
Select Pin
State
High
High
Low
Low
Register #0 State
after Cycle
High
Low
X
X
ATF750C(L)
Register #1 State
IH
level on the I/O
after Cycle
High
Low
X
X
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