ZPSD211RM View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ZPSD211RM

Low Cost Field Programmable Microcontroller Peripherals

STMicroelectronics 

PSD211R Family

13.0

Program/Data

Space and the

8031

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.

Figure 9. Combined Address Space

ADDRESS

PAD

INTERNAL RD

PSEN

CS

OE

I/O PORTS

OE

EPROM

CS

Figure 10. 8031-Compatible Separate Code and Data Address Spaces

INTERNAL RD

I/O PORTS

OE

CS

ADDRESS

PSEN

PAD

CS

EPROM

OE

20

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