PSD4235G2V-10U STMICROELECTRONICS [STMicroelectronics], PSD4235G2V-10U Datasheet - Page 46
PSD4235G2V-10U
Manufacturer Part Number
PSD4235G2V-10U
Description
Flash In-System Programmable (ISP) Peripherals for 16-bit MCUs
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.PSD4235G2V-10U.pdf
(100 pages)
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PSD4256G6V
External Chip Select
The CPLD also provides eight External Chip Se-
lect (ECS0-ECS7) outputs that can be used to se-
lect external devices. Each External Chip Select
(ECS0-ECS7) consists of one product term that
can be configured active High or Low.
Figure 17. External Chip Select Signal
Figure 18. Handshaking Communication Using Input Macrocells
46/100
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
MASTER
MCU
MCU- RD
MCU- WR
D [ 7:0 ]
ECS PT
PSD
POLARITY
BIT
CPLD
ENABLE (.OE) PT
MCU -RD
MCU - WR
To Port C or F
SLAVE – CS
SLAVE – WR
ECS
SLAVE– READ
RD
WR
The output enable of the pin is controlled by either
the output enable product term or the Direction
Register. (See Figure 17.)
MACROCELL
DATA OUT
REGISTER
PORT A
PORT A
INPUT
D
Q
Port C or Port F
Q
D
DIRECTION
REGISTER
PORT A
D [ 7:0 ]
PORT PIN
AI04927
AI02877C
SLAVE
MCU
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