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PSD4235G2 Datasheet(PDF) 38 Page - STMicroelectronics

Part # PSD4235G2
Description  Flash In-System Programmable ISP Peripherals For 16-bit MCUs 5V Supply
PDF  89 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD4235G2 Datasheet(HTML) 38 Page - STMicroelectronics

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Figure 16. Input Macrocell
External Chip Select. The CPLD also provides
eight External Chip Select (ECS0-ECS7) outputs
that can be used to select external devices. Each
External Chip Select (ECS0-ECS7) 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 17.)
Figure 17. External Chip Select Signal
OUTPUT
MACROCELLS A
AND
MACROCELLS B
PT
PT
FEEDBACK
PORT
DRIVER
I/O PIN
INTERNAL DATA BUS
DIRECTION
REGISTER
MUX
MUX
ALE/AS
PT
Q
Q
D
D
G
LATCH
INPUT MACROCELL
ENABLE (.OE)
D FF
INPUT MACROCELL _ RD
AI04926
POLARITY
BIT
PORT PIN
ECS PT
ECS
To Port C or F
ENABLE (.OE) PT
DIRECTION
REGISTER
Port C or Port F
AI04927



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