PSD4235G2V-10UI datasheet(48/100 Pages) STMICROELECTRONICS

Nome de Peças	PSD4235G2V-10UI

Descrição Electrónicos	Flash In-System Programmable (ISP) Peripherals for 16-bit MCUs

PDF	100 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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48 / 100 page

PSD4256G6V

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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

BHE

ALE

RESET

AD [ 7:0]

AD[15:8]1

A[ 15: 8]

A[ 7: 0]

ADIO

PORT

WR (CNTRL0)

RD (CNTRL1)

BHE (CNTRL2)

RST

ALE (PD0)

PORT D

(OPTIONAL)

PSD

AI04928B

A[ 23:16]

(OPTIONAL)

or A[15:8]

PSD4235G2V-10UI Folha de dados(PDF) 48 Page - STMicroelectronics