psd813f3 STMicroelectronics, psd813f3 Datasheet - Page 61

• Manufacturer Part Number: psd813f3
• Description: Flash In-system Programmable Isp Peripherals For 8-bit Mcus
• Manufacturer: STMicroelectronics

External Chip Select
The CPLD also provides three External Chip Se-
lect (ECS0-ECS2) outputs on Port D pins that can
be used to select external devices. Each External
Chip Select (ECS0-ECS2) consists of one product
Figure 31. Port D External Chip Select Signals
PT0
PT1
PT2
POLARITY
POLARITY
POLARITY
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
BIT
BIT
BIT
ENABLE (.OE)
ENABLE (.OE)
ENABLE (.OE)
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 31.)
ECS0
ECS1
ECS2
DIRECTION
DIRECTION
DIRECTION
REGISTER
REGISTER
REGISTER
PD0 PIN
PD1 PIN
PD2 PIN
AI02890
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