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PSD835G2 Datasheet(PDF) 24 Page - STMicroelectronics

Part # PSD835G2
Description  Flash PSD, 5V Supply, for 8-bit MCUs 4 Mbit 256 Kbit Dual Flash Memories and 64 Kbit SRAM
PDF  102 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD835G2 Datasheet(HTML) 24 Page - STMicroelectronics

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PSD835G2
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DETAILED OPERATION
As shown in Figure 3., page 15, the PSD consists
of six major types of functional blocks:
■
Memory Blocks
■
PLD Blocks
■
MCU Bus Interface
■
I/O Ports
■
Power Management Unit (PMU)
■
JTAG/ISP Interface
The functions of each block are described in the
following sections. Many of the blocks perform
multiple functions, and are user configurable.
Memory Blocks
The PSD has the following memory blocks:
– Primary Flash memory
– Secondary Flash memory
–SRAM
The Memory Select signals for these blocks origi-
nate from the Decode PLD (DPLD) and are user-
defined in PSDsoft.
Table 27. Memory Block Size and Organization
Primary Flash Memory
Secondary Flash Memory
SRAM
Sector
Number
Sector Size
(Bytes)
Sector Select
Signal
Sector Size
(Bytes)
Sector Select
Signal
SRAM Size
(Bytes)
SRAM Select
Signal
0
64K
FS0
8K
CSBOOT0
16K
RS0
1
64K
FS1
8K
CSBOOT1
2
64K
FS2
8K
CSBOOT2
3
64K
FS3
8K
CSBOOT3
4
64K
FS4
5
64K
FS5
6
64K
FS6
7
64K
FS7
Total
512K
8 Sectors
32K
4 Sectors
16K



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