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PSD211RN Datasheet(PDF) 23 Page - STMicroelectronics

Part # PSD211RN
Description  Low Cost Field Programmable Microcontroller Peripherals
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD211RN Datasheet(HTML) 23 Page - STMicroelectronics

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PSD211R Family
20
13.0
Program/Data
Space and the
8031
Figure 9. Combined Address Space
INTERNAL
OE
OE
CS
CS
RD
ADDRESS
PSEN
I/O PORTS
PAD
EPROM
Figure 10. 8031-Compatible Separate Code and Data Address Spaces
INTERNAL
OE
OE
CS
CS
RD
ADDRESS
PSEN
I/O PORTS
PAD
EPROM
This section only applies to users who have an 8031 or compatible MCU that outputs a
signal such as PSEN when accessing program space. If this applies to you, be aware of the
following: the PSD211R can be configured using PSDsoft such that the EPROM is either 1)
accessed by PSEN only (Figure 10); or 2) accessed by PSEN or RD (Figure 9). The default
is PSEN only unless changed in PSDsoft.



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