UPSD3212A Datasheet, PDF (121/163 Pages) STMicroelectronics – Flash Programmable System Devices with 8032 MCU with USB and Programmable Logic

uPSD3212A, uPSD3212C, uPSD3212CV
External Chip Select
The CPLD also provides two External Chip Select
(ECS1-ECS2) outputs on Port D pins that can be
used to select external devices. Each External
Chip Select (ECS1-ECS2) consists of one product
term that can be configured active High or Low.
The output enable of the pin is controlled by either
the output enable product term or the Direction
Register. (See Figure 64.)
Figure 64. Port D External Chip Select Signals
ENABLE (.OE)
DIRECTION
REGISTER
PT1
POLARITY
BIT
ECS1
PD1 PIN
ENABLE (.OE)
PT2
POLARITY
BIT
DIRECTION
REGISTER
ECS2
PD2 PIN
AI06607
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