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PIC17C752-08/CL bảng dữ liệu(PDF) 63 Page - Microchip Technology

tên linh kiện PIC17C752-08/CL
Giải thích chi tiết về linh kiện  High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D
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nhà sản xuất  MICROCHIP [Microchip Technology]
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PIC17C752-08/CL bảng dữ liệu(HTML) 63 Page - Microchip Technology

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© 1998 Microchip Technology Inc.
DS30289A-page 63
PIC17C7XX
8.4
Operation with External Memory
Interface
When the table reads/writes are accessing external
memory (via the external system interface bus), the
table latch for the table reads is different from the table
latch for the table writes (see Figure 8-9).
This means that you cannot do a TABLRD instruction,
and use the values that were loaded into the table
latches for a TABLWT instruction. Any table write
sequence should use both the TLWT and then the
TABLWT
instructions.
FIGURE 8-9:
ACCESSING EXTERNAL MEMORY WITH TABLRD AND TABLWT INSTRUCTIONS
TABLPTR
TABLATH (for Table Reads)
TABLATH (for Table Writes)
Program Memory
TABLRD
TABLWT
(In External Memory Space)



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