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PSD813F1AV-12MIT bảng dữ liệu(PDF) 32 Page - STMicroelectronics

tên linh kiện PSD813F1AV-12MIT
Giải thích chi tiết về linh kiện  Flash In-System Programmable (ISP) Peripherals for 8-bit MCUs, 3.3V
PDF  110 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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PSD813F1AV-12MIT bảng dữ liệu(HTML) 32 Page - STMicroelectronics

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Separate Space Modes
Code memory space is separated from data mem-
ory space. For example, the PSEN signal is used
to access the program code from the Flash Mem-
ory, while the RD signal is used to access data
from the EEPROM, SRAM and I/O Ports. This
configuration requires the VM register to be set to
0Ch. See Figure 12.
Combined Space Modes
The program and data memory spaces are com-
bined into one space that allows the main Flash
Memory, EEPROM, and SRAM to be accessed by
either PSEN or RD. For example, to configure the
main Flash memory in combined space mode, bits
2 and 4 of the VM register are set to “1” (see Figure
13).
Figure 12. 80C31 Memory Modes - Separate Space
Figure 13. 80C31 Memory Mode - Combined Space
Flash
Memory
DPLD
EEPROM
Memory
SRAM
RS0
EES0-EES3
FS0-FS7
CS
CS
CS
OE
OE
RD
PSEN
OE
AI09222
Flash
Memory
DPLD
EEPROM
Memory
SRAM
RS0
EES0-EES3
FS0-FS7
RD
CS
CS
CS
RD
OE
OE
VM REG BIT 2
PSEN
VM REG BIT 0
VM REG BIT 1
VM REG BIT 3
VM REG BIT 4
OE
AI09223



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