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PSD4235G2 데이터시트(PDF) 20 Page - STMicroelectronics

부품명 PSD4235G2
상세설명  Flash In-System Programmable ISP Peripherals For 16-bit MCUs 5V Supply
PDF  89 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD4235G2 데이터시트(HTML) 20 Page - STMicroelectronics

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DETAILED OPERATION
As shown in Figure 4, the PSD consists of six ma-
jor types of functional blocks:
s
Memory Blocks
s
PLD Blocks
s
MCU Bus Interface
s
I/O Ports
s
Power Management Unit (PMU)
s
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 Express.
Table 28 sumamarizes the sizes and organisa-
tions of the memory blocks.
Table 28. Memory Block Size and Organization
Primary Flash Memory
Secondary Flash Memory
SRAM
Sector
Number
Sector Size
(x16)
Sector Select
Signal
Sector Size
(x16)
Sector Select
Signal
SRAM Size
(x16)
SRAM Select
Signal
0
32K
FS0
4K
CSBOOT0
4K
RS0
1
32K
FS1
4K
CSBOOT1
2
32K
FS2
4K
CSBOOT2
3
32K
FS3
4K
CSBOOT3
4
32K
FS4
5
32K
FS5
6
32K
FS6
7
32K
FS7
Totals
512KByte
8 Sectors
32KByte
4 Sectors
8KByte



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