PSD913F3V-20JI View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'PSD913F3V-20JI' PDF : 110 Pages View PDF
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
PSD Interface to a Multiplexed 8-Bit Bus
Figure 19 shows an example of a system using a
MCU with an 8-bit multiplexed bus and a PSD. 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 A or
B. 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
D may be used as additional address inputs.
Figure 19. An Example of a Typical 8-bit Multiplexed Bus Interface
MCU
WR
RD
BHE
ALE
RESET
AD[ 7:0]
A[ 15:8]
PSD
ADIO
PORT
WR (CNTRL0)
RD (CNTRL1)
BHE (CNTRL2)
RST
PORT
A
PORT
B
PORT
C
ALE (PD0)
PORT D
A[7: 0]
(OPTIONAL)
A[15: 8]
(OPTIONAL)
AI02878C
44/110
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