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HD6417618A Folha de dados(PDF) 172 Page - Renesas Technology Corp

Nome de Peças HD6417618A
Descrição Electrónicos  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
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HD6417618A Folha de dados(HTML) 172 Page - Renesas Technology Corp

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Section 7 Bus State Controller (BSC)
Rev. 6.00 Jun. 12, 2007 Page 140 of 610
REJ09B0131-0600
7.4.7
Refresh Time Constant Register (RTCOR)
RTCOR is an 8-bit register. When RTCOR matches RTCNT, the CMF bit in RTCSR is set to 1
and RTCNT is cleared to 0. When the RFSH bit in SDCR is 1, a memory refresh request is issued.
The request is maintained until the refresh operation is performed. If the request is not processed
when the next matching occurs, the previous request is ignored.
When the RTCOR is written to, the upper 16 bits of the write data must be H'A55A to cancel write
protection.
Bit
Bit Name
Initial
Value
R/W
Description
31 to 8
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
7 to 0
All 0
R/W
8-bit Counter



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