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PSD4235G2V-10UI датащи(PDF) 48 Page - STMicroelectronics

номер детали PSD4235G2V-10UI
подробное описание детали  Flash In-System Programmable (ISP) Peripherals for 16-bit MCUs
PDF  100 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD4235G2V-10UI датащи(HTML) 48 Page - STMicroelectronics

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This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
PSD Interface to a Multiplexed Bus
Figure 19 shows an example of a system using an
MCU with a multiplexed bus and a PSD4256G6V.
The ADIO port on the PSD is connected directly to
the MCU address/data bus. Address Strobe (ALE/
AS, PD0) latches the address signals internally.
Latched addresses can be brought out to Port E, F
or G. The PSD drives the ADIO data bus only
when one of its internal resources is accessed and
READ Strobe (RD, CNTL1) is active. Should the
system address bus exceed sixteen bits, Ports A,
B, C, or F may be used as additional address in-
puts.
Figure 19. An Example of a Typical Multiplexed Bus Interface
Note: 1. AD[15:8] is for 16-bit MCU
MCU
WR
RD
BHE
ALE
RESET
AD [ 7:0]
AD[15:8]1
A[ 15: 8]
A[ 7: 0]
ADIO
PORT
PORT
F
PORT
G
PORT
A
WR (CNTRL0)
RD (CNTRL1)
BHE (CNTRL2)
RST
ALE (PD0)
PORT D
(OPTIONAL)
(OPTIONAL)
PSD
AI04928B
A[ 23:16]
(OPTIONAL)
or A[15:8]



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