PSD813F2-A-70J STMicroelectronics, PSD813F2-A-70J Datasheet - Page 44
PSD813F2-A-70J
Manufacturer Part Number
PSD813F2-A-70J
Description
Manufacturer
STMicroelectronics
Datasheet
1.PSD813F2-A-70J.pdf
(128 pages)
Specifications of PSD813F2-A-70J
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Package Type
PLCC
Mounting
Surface Mount
Pin Count
52
Lead Free Status / RoHS Status
Compliant
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Sector Select and SRAM Select
12.3
12.3.1
12.3.2
44/128
PSDsoft Express Configuration to configure it for Boot-up and having the MCU change it
when desired.
Figure 8.
Configuration modes for MCUs with separate program and
data spaces
Separate Space modes
Program space is separated from data space. For example, Program Select Enable (PSEN,
CNTL2) is used to access the program code from the primary Flash memory, while Read
Strobe (RD, CNTL1) is used to access data from the secondary Flash memory, SRAM and
I/O port blocks. This configuration requires the VM register to be set to 0Ch (see
Combined Space modes
The program and data spaces are combined into one memory space that allows the primary
Flash memory, secondary Flash memory, and SRAM to be accessed by either Program
Select Enable (PSEN, CNTL2) or Read Strobe (RD, CNTL1). For example, to configure the
primary Flash memory in Combined space, Bits b2 and b4 of the VM register are set to '1'
(see
Figure 9.
Figure
DPLD
10).
Priority level of memory and I/O components
8031 memory modules – separate space
Table 14
RD
RS0
CSBOOT0-3
FS0-FS7
PSEN
Highest Priority
Lowest Priority
describes the VM register.
Doc ID 7833 Rev 7
CS
Primary
Memory
Flash
OE
Primary Flash Memory
Non-Volatile Memory
SRAM, I/O, or
Peripheral I/O
Secondary
Level 1
Level 2
Level 3
Secondary
CS
Memory
Flash
OE
AI02867D
CS
SRAM
OE
PSD8XXFX
Figure
AI02869C
9).
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