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SH7052 bảng dữ liệu(PDF) 693 Page - Renesas Technology Corp

tên linh kiện SH7052
Giải thích chi tiết về linh kiện  SuperHTM RISC engine
PDF  919 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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SH7052 bảng dữ liệu(HTML) 693 Page - Renesas Technology Corp

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When a pin functions as a general output, if a value is written to PCDR, that value is output
directly from the pin, and if PCDR is read, the register value is returned directly regardless of the
pin state.
When a pin functions as a general input, if PCDR is read the pin state, not the register value, is
returned directly. If a value is written to PCDR, although that value is written into PCDR it does
not affect the pin state. Table 19.6 summarizes port C data register read/write operations.
PCDR is initialized to H'0000 by a power-on reset (excluding a WDT power-on reset), and in
hardware standby mode. It is not initialized in software standby mode or sleep mode.
• Bits 15 to 5—Reserved: These bits always read 0. The write value should always be 0.
Table 19.6
Port C Data Register (PCDR) Read/Write Operations
Bits 4 to 0:
PCIOR
Pin Function
Read
Write
0
General input
Pin state
Value is written to PCDR, but does not affect pin
state
Other than
general input
Pin state
Value is written to PCDR, but does not affect pin
state
1
General output
PCDR value
Write value is output from pin
Other than
general output
PCDR value
Value is written to PCDR, but does not affect pin
state



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